Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1

Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1

Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Pinty Rifle Scope 4-16X50 Illuminated Optics Sight Green Laser, Reflex Holographic Dot Sight, Riser Mount 14 Slots 1 inch High Riser Mount. Fits all standard 20mm picatinny rail. Three-in-one 4-16×50 riflescope combo system provides the best value. Our premium riflescope features unsurpassed light transmission, uncompromising mechanical performance and unbeatable optical clarity. The matching green laser sight helps you to aim better and the red dot sight equips you with better vision even in the darkest environment. Buttons on reflector can help to adjust its brightness. And the reticle will be closed when you press the red & green control button at the same time. Magnification is from 3 times up to 9 times. Green and red illuminations with 5 brightness adjustments for the riflescope and electronic unlimited brightness control for the dot sight. Water proof and fog proof, it also comes with free lens covers. Take our riflescope with you on your next hunting trip! 1x 4-16X50 Rifle scope. 1x Green laser sight. 3x Allen keys for rail mounting and sight adjustment. Brightness Control: Red and green with 5 levels. Eye Relief: 3″ 3.4″. Exit Pupil: 3.3mm 10mm. Brightness Control: Red and green with 9 levels. Reticle: 4 reticle patterns. Power: 1 x CR2. 1 High, 14 Slots. Dimensions inches (L x W): 5.7”x 1.75′. Item Dimensions: (L x W x H) = (14.13 x 5.43 x 3.66) Inches. 4-in-1, comes with a illuminated optics sight, a green laser, a holographic dot sight and a 14 slots riser mount. 2 separate buttons to adjust the 9 brightness levels for both green & red illuminated dot sight with 4 reticle patterns. Detachable green laser w/ independent switch can reach distance about 100m (110 yards), provides high accuracy for hunting & shooting. Boasting 4x-16x magnification, this optics is well suited for wide range shooting, perfect for quick acquisition of close quarter & fast moving targets. 14 slots riser mount with 5.7 inches in length is compatible with all picatinny as well as weaver standard scopes. After Sale Service: Our friendly and reliable customer service will respond to you within 24 hours. After receiving the item. Within 14 Days for return!! Any product you return must be in the same condition you received it and in the original packaging. Please, keep the receipt. We usually respond within 24 hours on weekdays.. Note: Please, don’t take any step without communication. We will mutually try our best to resolve your any issue as soon as possible.. This item comes as a brand new… !! So, You will confidently receive a genuine product. This item is in the category “Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser”. The seller is “thesupplychainusa” and is located in this country: US. This item can be shipped to United States.
  • EAN: 0313109738799
  • UPC: 313109738799

Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch
PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch
Perst-4 is used to point targets when observing, inspecting and watching small arms shooting at night. This product is a small optical mechanical device that forms laser radiation flux. This product is installed on Picatinny rails. The KV-D2 Tactical swtich (in the kit)can be installed on picatinny rails and 1913 rails. Perst-4 contains 2 laser functions:Green Laser light source: wavelength – 532 nm/IR light source: wavelength – 850 nm. Green Laser light source: wavelength – 532 nm? IR light source: wavelength – 850 nm? Power supply: CR123A (Not included) / battery (3 V). (Product does not include battery). Effective range in the dark:Green beam: 500 ± 100 m. IR beam: 400 ± 100 m. 91 ± 3 mm. Fit For: 20mm Picatinny Rail? Material: Metal Special Note:? The triangular area on the host can switch between visible laser and IR? On the top or side of the host, the round switch is turned on. Turn on through the KV-1P Wire Control Switch? Press the swtich quickly to realize the strobe function? Two small circular buttons on the main unit to adjuest the laser brightness. 1Tactical laser light Notes:? Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 3 mm. This item is in the category “Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser”. The seller is “nswdzao7″ and is located in this country: US. This item can be shipped to United States.
  • Color: #Black
  • Brand: WADSN
  • Features: Green Laser, IR Laser
  • For Gun Type: Rifle
  • Material: Aluminum Alloy
  • Maximum Magnification: 1x
  • Model: PERST-4
  • Mounting: Picatinny
  • Mounting Location: Rail
  • Reticle Color: IR/Green
  • Type: Laser Sight

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

Vector Optics Viperwolf Green Laser and IR Laser Combo Sight for Night Vision

Vector Optics Viperwolf Green Laser and IR Laser Combo Sight for Night Vision
Vector Optics Viperwolf Green Laser and IR Laser Combo Sight for Night Vision
Vector Optics Viperwolf Green Laser and IR Laser Combo Sight for Night Vision
Vector Optics Viperwolf Green Laser and IR Laser Combo Sight for Night Vision
Vector Optics Viperwolf Green Laser and IR Laser Combo Sight for Night Vision
Vector Optics Viperwolf Green Laser and IR Laser Combo Sight for Night Vision

Vector Optics Viperwolf Green Laser and IR Laser Combo Sight for Night Vision
Vector Optics Viperwolf Green Laser and IR Laser Combo Sight for Night Vision. This item is in the category “Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser”. The seller is “allachka31″ and is located in this country: US. This item can be shipped to United States.
  • Type: Laser
  • Model: SCGL-04 Viperwolf
  • MPN: Viperwolf-Green-Laser
  • Features: Green Laser
  • Reticle Color: Green

Vector Optics Viperwolf Green Laser and IR Laser Combo Sight for Night Vision

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch
PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch
PERST-4 IR Green Laser Sight. Perst-4 is used to point targets when observing, inspecting and watching small arms shooting at night. This product is a small optical mechanical device that forms laser radiation flux. This product is installed on Picatinny rails. The KV-D2 Tactical swtich (in the kit)can be installed on picatinny rails and 1913 rails. Perst-4 contains 2 laser functions. Green Laser light source: wavelength – 635 nm. IR light source: wavelength – 850 nm. Power supply: CR123A (Not included) / battery (3 V). Effective range in the dark. Red beam: 300 ± 100 m. IR beam: 400 ± 100 m. Product weight without batteries: no more than 210 g. 91 ± 3 mm. The triangular area on the host can switch between visible laser and IR. On the top or side of the host, the round switch is turned on. Turn on through the KV-1P Wire Control Switch. Press the swtich quickly to realize the strobe function. Two small circular buttons on the main unit to adjuest the laser brightness. Fit For: 20mm Picatinny Rail. Please list your special requests color, packages, etc. Our working hours Beijing time from 9:00 a. To 18:00 p. The images shown are not the actual item and are for your reference only. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season. Other countries or remote areas may take longer. For defective items (excluding items damaged and/or misused after receipt). It from the date it was received. In the original packaging. Specific reason for the return, and. OR, you may choose to have a replacement. Our office hours are: 9:00 a. M to 6:00 p. M (GMT +8) of Monday to Saturday. And our office is closed on Sunday and public holidays (China). We apologize for the late reply during the holidays. Feedback is very important to us. Excludes weekends and holidays. If you are satisfied with our products and service. Please do not forget to leave a good review to us, thanks! For all orders, please note that. This item is in the category “Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser”. The seller is “tf2019″ and is located in this country: US. This item can be shipped to United States.
  • Color: Black
  • Brand: VASTFIRE
  • Features: Green Laser, IR Laser
  • For Gun Type: Rifle
  • Maximum Magnification: 1x
  • Model: PERST-4
  • Mounting: Picatinny
  • Mounting Location: Rail
  • Reticle Color: Green, IR
  • Type: Laser Sight

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch
PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch
Full metal high quality version Material: Metal Fit For: 20mm Picatinny Rail Perst-4 is used to point targets when observing, inspecting and watching small arms shooting at night. This product is a small optical mechanical device that forms laser radiation flux. This product is installed on Picatinny rails. The KV-5PU Tactical swtich (in the kit)can be installed on picatinny rails and 1913 rails. Perst-4 contains 2 laser functions: Green VIS laser source: wavelength – 635 nm IR laser source: wavelength – 850 nm Battery type: 1 CR123A battery (3v / 3.7v). (Not included) Effective range in the dark: VIS Green Laser beam: 300 ± 100 m. IR laser beam: 400 ± 100 m. 91 ± 3 mm. Full metal high quality version. Fit For: 20mm Picatinny Rail. Perst-4 is used to point targets when observing, inspecting and watching small arms shooting at night. Perst-4 contains 2 laser functions. Green VIS laser source: wavelength – 635 nm. IR laser source: wavelength – 850 nm. Battery type: 1 CR123A battery (3v / 3.7v). Effective range in the dark. VIS Green Laser beam: 300 ± 100 m. The triangular area on the host can switch between visible laser and IR. On the top or side of the host, the round switch is turned on. Turn on through the KV-5PU Wire Control Switch. Two small circular buttons on the main unit to adjuest the laser brightness. If you do not receive your item on time, please firstly go to your local post office to check if the package is left there. It happens sometimes when the receiver is not at home. Return without notice is not acceptable. If items defect after 30 days, you can still send it back to us. We wil do our best to deal with all issues you asked. Brightness Settings, Green Laser, Lightweight. This item is in the category “Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser”. The seller is “wyhsports” and is located in this country: CN. This item can be shipped worldwide.
  • Color: Black
  • Type: Laser Sight
  • Reticle Color: Green
  • Brand: Unbranded
  • Mounting: Picatinny
  • Features: Brightness Settings, Green Laser, Lightweight
  • For Gun Type: Rifle

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch
PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch
Full metal high quality version Material: Metal Fit For: 20mm Picatinny Rail Perst-4 is used to point targets when observing, inspecting and watching small arms shooting at night. This product is a small optical mechanical device that forms laser radiation flux. This product is installed on Picatinny rails. The KV-5PU Tactical swtich (in the kit)can be installed on picatinny rails and 1913 rails. Perst-4 contains 2 laser functions: Green VIS laser source: wavelength – 635 nm IR laser source: wavelength – 850 nm Battery type: 1 CR123A battery (3v / 3.7v). (Not included) Effective range in the dark: VIS Green Laser beam: 300 ± 100 m. IR laser beam: 400 ± 100 m. 91 ± 3 mm. Full metal high quality version. Fit For: 20mm Picatinny Rail. Perst-4 is used to point targets when observing, inspecting and watching small arms shooting at night. Perst-4 contains 2 laser functions. Green VIS laser source: wavelength – 635 nm. IR laser source: wavelength – 850 nm. Battery type: 1 CR123A battery (3v / 3.7v). Effective range in the dark. VIS Green Laser beam: 300 ± 100 m. The triangular area on the host can switch between visible laser and IR. On the top or side of the host, the round switch is turned on. Turn on through the KV-5PU Wire Control Switch. Two small circular buttons on the main unit to adjuest the laser brightness. If you do not receive your item on time, please firstly go to your local post office to check if the package is left there. It happens sometimes when the receiver is not at home. Return without notice is not acceptable. If items defect after 30 days, you can still send it back to us. We wil do our best to deal with all issues you asked. Brightness Settings, Green Laser, Lightweight. This item is in the category “Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser”. The seller is “tf2019″ and is located in this country: US. This item can be shipped to United States.
  • Color: Black
  • Brand: Unbranded
  • Features: Brightness Settings, Green Laser, Lightweight
  • For Gun Type: Rifle
  • Mounting: Picatinny
  • Reticle Color: Green
  • Type: Laser Sight

PERST 4 Aiming Pointer Optics Green Laser / IR Laser Sight KV-D2 Tactical Switch

Steiner Optics DBAL-I2 IR Laser / Red Laser 9005 Tan LOWEST PRICE ANYWHERE

Steiner Optics DBAL-I2 IR Laser / Red Laser 9005 Tan LOWEST PRICE ANYWHERE
Steiner Optics DBAL-I2 IR Laser / Red Laser 9005 Tan LOWEST PRICE ANYWHERE

Steiner Optics DBAL-I2 IR Laser / Red Laser 9005 Tan LOWEST PRICE ANYWHERE
Steiner Optics DBAL-I2 IR Laser / red Laser 9005 Tan. Kosher Surplus is the largest Steiner Optics laser dealer in the US. This item is in the category “Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser”. The seller is “koshersurplus” and is located in this country: US. This item can be shipped to United States.
  • Brand: Steiner
  • Mounting: Rail
  • Type: Laser
  • Color: Brown
  • Model: Steiner CQBL-1
  • MPN: 9006
  • Features: Red Laser
  • For Gun Type: Rifle
  • Reticle Color: Green

Steiner Optics DBAL-I2 IR Laser / Red Laser 9005 Tan LOWEST PRICE ANYWHERE

Steiner Optics DBAL-I2 IR Laser / Red Laser 9005 Tan LOWEST PRICE ANYWHERE

Steiner Optics DBAL-I2 IR Laser / Red Laser 9005 Tan LOWEST PRICE ANYWHERE
Steiner Optics DBAL-I2 IR Laser / Red Laser 9005 Tan LOWEST PRICE ANYWHERE

Steiner Optics DBAL-I2 IR Laser / Red Laser 9005 Tan LOWEST PRICE ANYWHERE
Steiner Optics DBAL-I2 IR Laser / red Laser 9005 Tan. Kosher Surplus is the largest Steiner Optics laser dealer in the US. This item is in the category “Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser”. The seller is “koshersurplus” and is located in this country: US. This item can be shipped to United States.
  • Brand: Steiner
  • Mounting: Rail
  • Type: Laser
  • Color: Brown
  • Model: Steiner CQBL-1
  • MPN: 9006
  • Features: Red Laser
  • For Gun Type: Rifle
  • Reticle Color: Green

Steiner Optics DBAL-I2 IR Laser / Red Laser 9005 Tan LOWEST PRICE ANYWHERE

WADSN Airsoft Metal Mini DABLA2 Green Laser IR PEQ Pointer Optics Sight Laser

WADSN Airsoft Metal Mini DABLA2 Green Laser IR PEQ Pointer Optics Sight Laser
WADSN Airsoft Metal Mini DABLA2 Green Laser IR PEQ Pointer Optics Sight Laser

WADSN Airsoft Metal Mini DABLA2 Green Laser IR PEQ Pointer Optics Sight Laser
WADSN Airsoft Metal Mini DABLA2 Green Laser IR PEQ Pointer Optics Sight Laser Green +IR Laser. Notice:The working voltage of the green laser is 3-4.2V, when the voltage is lower than 3V, the green laser will not light up. Item Name:Metal DBAL-MINI-A2. Laser, IR Laser, Green. Green Laser Power:5mV. IR Laser Power:7mV. 21mm standard quick release base. Tactical Runtime:Green Light 5H (CR123). 1tail extension control switch. 1:The product is only used for Airsoft. 2:When you are not using the product, remember to take out the battery. If you don’t take out the battery, the battery’s power will slowly run out. It is recommended to use 16340 sustainable rechargeable battery for this product, because this product consumes power faster, if CR123A battery is used, it may not be enough to support the product. Due to the epidemic, the logistics time limit for each country is 20 days. We care about our buyers, if you have any question, our Customer Service staffs will be very glad to help you. We try our best to reply to your emails as soon as possible, because of time zone difference, we may not be able to reply your emails immediately. This item is in the category “Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser”. The seller is “wadsn-05″ and is located in this country: US. This item can be shipped to United States, all countries in Europe, all countries in continental Asia, Canada, Mexico, Australia.
  • Color: Green Sight Laser
  • Power Source: Battery
  • IR Laser Power: 7mv
  • Manufacturer Warranty: 1 Month
  • Battery: 1*16340/1*CR123A(Not Included)
  • Function 3: Green Laser Flash
  • Function 2: IR Laser
  • Function 1: Green Laser
  • Features: Green Laser, With Lens Cover, With QD mount, IR Pointer Sight Laser
  • Green Laser Power: 5mv
  • Sport/Activity: Hunting
  • Fit For: 20mm Picatinny Rail
  • Material: Aluminum Alloy
  • Set Includes: 1 piece Mini DBAL-A2
  • Weight: 153g
  • Brand: WADSN
  • Mounting: Picatinny, Quick Detach
  • Item Name: Metal DBAL-MINI-A2 Version
  • Type: Laser
  • Model: Metal Mini DABL-A2
  • For Gun Type: Airsoft, Paintball
  • Country/Region of Manufacture: China
  • Mounting Location: Rail

WADSN Airsoft Metal Mini DABLA2 Green Laser IR PEQ Pointer Optics Sight Laser

Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1

Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1

Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1
Pinty Rifle Scope 4-16X50 Illuminated Optics Sight Green Laser, Reflex Holographic Dot Sight, Riser Mount 14 Slots 1 inch High Riser Mount. 4-in-1, comes with a illuminated optics sight, a green laser, a holographic dot sight and a 14 slots riser mount. 2 separate buttons to adjust the 9 brightness levels for both green & red illuminated dot sight with 4 reticle patterns. Detachable green laser w/ independent switch can reach distance about 100m (110 yards), provides high accuracy for hunting & shooting. Boasting 4x-16x magnification, this optics is well suited for wide range shooting, perfect for quick acquisition of close quarter & fast moving targets. 14 slots riser mount with 5.7 inches in length is compatible with all picatinny as well as weaver standard scopes. Fits all standard 20mm picatinny rail. Three-in-one 4-16×50 riflescope combo system provides the best value. Our premium riflescope features unsurpassed light transmission, uncompromising mechanical performance and unbeatable optical clarity. The matching green laser sight helps you to aim better and the red dot sight equips you with better vision even in the darkest environment. Buttons on reflector can help to adjust its brightness. And the reticle will be closed when you press the red & green control button at the same time. Magnification is from 3 times up to 9 times. Green and red illuminations with 5 brightness adjustments for the riflescope and electronic unlimited brightness control for the dot sight. Water proof and fog proof, it also comes with free lens covers. Take our riflescope with you on your next hunting trip! 1x 4-16X50 Rifle scope. 1x Green laser sight. 3x Allen keys for rail mounting and sight adjustment. Brightness Control: Red and green with 5 levels. Eye Relief: 3″ 3.4″. Exit Pupil: 3.3mm 10mm. Brightness Control: Red and green with 9 levels. Reticle: 4 reticle patterns. Power: 1 x CR2. 1 High, 14 Slots. Dimensions inches (L x W): 5.7”x 1.75′. We offer the best prices around on high quality products. Our E-store includes media such as books, movies, music and games while offering electronics, toys, sporting apparel, clothing, tools, general home, garden items and more. We are always working hard to ensure your package arrives as soon as possible. We do not accept P. Please provide a physical address. We try our very best to make sure every customer is completely satisfied. If there’s a problem, message us! We’re happy to help. This item is in the category “Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser”. The seller is “olala_usa” and is located in this country: US. This item can be shipped to United States.
  • UPC: 313109738799
  • EAN: 0313109738799

Rifle Gun Sight Scope Optics Holographic Reflex Dot Laser Red Green Riser 4-in-1