We solemnly promise that the quality of our products is absolutely wonderful !!!Welcom to our shop to choose others !Thanks!Specifications:-Label power: 50 mw-Use 18650 batttery-The Working voltage: 3.7 V DC-The Start voltage: 3.6 V DC-Beam launching Angle: 1.2 + / - 0.2-Material: Aluminum alloy-Laser color: blue，-Where: 532 nm-Item size: 4.8 * 2.3 cm / 1.9 * 0.9 (H * D) in-The Item weight: 93.0 g / 3.3 oz-Packing list:1 x blue laser pointer (not incude the battery)2 x pcs safty keys