Specification:

1. Laser wavelength: 532nm 2. Output power: 5mW 3. Double switch: constant on / off switch and rear line switch 4. Wind and elevation adjustment 5. Power: 1x3V, CR2 lithium battery. (not included) 6. Tube size: 20 (Dia) mm x 105 (L) mm 7. Rail bracket size: 11-12mm and 17-18mm, double rail bracket. 8.Material: aluminum alloy 9.Color: matte black 10. Unit weight: 90g Packing list: 1 green laser sight 1 rear line switch 3x Allen key 1 double rail bracket 1x double tube holder 1 User Manual.