206470 Quantity 1 piece(s) per pack Color Black Material Aluminum alloy Suitable Gun Type 20mm universal broad gauge Laser Wavelength 635~655nm Laser Power <5mW Specification Powered by 1 x 16340 battery (included); Waterproof and shockproof; With adjustment stop knob for quick adjust the scope's accuracy; Comes with universal broad gauge holder (20mm) and English manual; Packing List 1 x Gun sight 1 x Hexagon wrench 1 x Mount 1 x Holder 1 x Pressure switch (25~65cm) 1 x Velcro