Check the listing for details. Metal PERST- 4 Aiming IR Green Laser Sight with Tactical Switch Reset Open SOTAC. Condition: New. Listed at 110.31 USD. Material: Metal This productis 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 switch (in the kit)can be installed on picatinny rails and 1913 rails. This product contains 2 laser functions: Green Laser light source: wavelength - 635 nm IR light source: wavelength - 850 nm Power supply: CR123A / battery (3 V). (Not included) Effective range in the dark: red beam: 300 ± 100 m.; IR beam: 400 ± 100 m. 1. The triangular area on the host can switch between visible laser and IR 2. On the top or side of the host , the round switch is turned on. Turn on through the KV-1P Wire Control Switch 3. Press the swtich quickly to realize the strobe function 4. Two small circular buttons on the main unit to adjuest the laser brightness. Fit For: 20mm Picatinny Rail Tip: 1.There is NO Battery unit inside. 2.Due to the lighting effect, there may be color difference in the pictures taken. Q&A: Q: Why does the product not include batteries? A:Because batteries belong to the transportation of dangerous goods in international logistics. Q:Why hasn't logistics information been updated for a long time? A: Dear, if the logistics information has not been updated for a long time, you can check the logistics information on this website：https://www.17track.net/en/.Or contact us directly. Q: The logistics information shows that the package has been delivered, but I have not received it. What should I do? A: Dear,please contact us immediately and explain the reason, we will help you obtain the package. Q: What should I do if I have any confusion about the product or logistics? A: Dear,please contact us directly, and we have a specialist to answer your questions.