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. (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. 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. Valid period is 60 days from the day of placing order, so please inform us about defect in advance once you find it. We always receive message and reply by within 24 hours when you sent us message. Thanks for your purchasing! You may also like. USB Rechargeable Green Purple Red Light Laser Beam Dot Visible Beam Lazer. EDC Green Purple Red Light Laser Pointer Pen Visible Beam Lazer USB Rechargeable. Red Green Laser Bore Sighter Kit. 50 12AG Multiple Caliber Boresighter. Tactical LED Flashlight Green Laser Sight Rifle Vertical Foregrip Grip 20mm Rail. 1000Miles Green Laser Optics Maser USB Rechargeable Visible Beam Light Lazer New. GREEN Laser Optic Light AAA Visible Lamp Torch 1mw Pet Dog Cat Toy, No battery. Rechargeable 990Mile Red Green Purple Laser Beam Dot Light Visible Beam Lazer.