Green Laser:Specail feature: the green laser spot size is adjustable、 the range is from 0 to 60mmKeylock switch to prevent mis-use by other peopleGreat for pointing objects from long distanceExtremely Visible green light beam in the darkRange in excess of 6、000 ftPower saving、 compact and reliableWave Length: 532nmPower by 1 * 18650 Battery or 1 * CR123A battery (All Not included battery)?Package included:1 x Laser Pen (Not include battery)2 x Safety lock key