197719 Model N/A Quantity：1 piece(s) per pack Color：Black Material：Aluminum alloy Suitable Gun Type：Universal for 20mm and 11mm barrel rail Laser Wavelength：635nm~655nm Laser Power：<5mW Laser Reaching Range：200 meters Specification：Powered by 3 x LR44 batteries (included) Packing List：1 x Gun sight 2 x Hex wrenches 3 x LR44 batteries 1 x English user manual Dimensions: 2.28 in x 1.22 in x 1.14 in (5.8 cm x 3.1 cm x 2.9 cm) Weight: 1.62 oz (46 g)