Model 851 Quantity 1 Color Black Material Harden aluminum Laser color Blue-violet Laser Power 5 mW Wave Length 405 nm Excitation Mode Optical Pump Working Mode Continuous laser Working Voltage 3.0~3.7 V Spot Mode (Spot size) Min diameter 1.0mm; Battery Configuration 1 x CR123 (not included) or 1 x 16340 (included) Functions Used for pointer remote indication mountaineering expeditions and other outdoor activities Other Feature Fixed focus continuous using life more than 5000 hour; 2-flat-pin plug battery charger input: AC 100~240V / 47~63hZ; Output: 3.7V / 450mA. Packing List 1 x Laser pointer 1 x 2-flat-pin plug battery charger 1 x 16340 battery 1 x Strap (15cm)