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 switch (in the kit)can be installed on picatinny rails and 1913 rails. Contains 2 laser functions. Green Laser light source: wavelength – 635 nm. IR light source: wavelength – 850 nm. Power supply: CR123A / 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. Overall dimensions: (37? 60? 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. By AUpost-eparcel from China. Thanks for your support and understanding! OUR WORKING Time(Beijing): 9:00am6:00pm(MondayFriday). We will be happy to serve you. Buyers need to responsible to pay for the returning package. For all orders, please note that. Please leave us a. With aPERFECT 5 STARS. Our goal is to make sure you are happy and have a pleasant shopping experience with us. We will do our best to resolve the issues. Please give us the opportunity to resolve any problem. It is impossible to address issues if we do not know about them!