Features: *Brand New Green Laser *Specail feature : the green laser spot size is adjustable、 the range is from 0 to 60mm *Keylock switch to prevent mis-use by other people *It can be operated by One 16340 battery or One 18650 battery *Great for pointing objects from long distance、 such as stars *Extremely Visible green light beam in the dark *Range in excess of 6、000 ft *Power saving、 compact and reliable *Cuts thin plastic (tested with thin plastic bags Specifications: *Brand New Green Laser *Material Made: Aerometal *Surface Treatment: Hard Anodizing Black *Switch: Instant ON/OFF *Adjustable Focus *Expected Lifetime: >8000 hours *Laser Range: 1000-5000 Meters *Max.Brightness: >350lm *Dimension: 21mm x 140mm *Wave Length: 532nm *Safety Level: Class III B *Circuit Control: APC *Beam Style: Continuous Line *Working temperature: 15 degrees C to 35 degrees C *Working voltage: DC=3.0-3.7V. *Battery required: 1 x 18650 (Battery included) *Safety lock with Key Package content: *1x Green Laser Pointer *1x Safety Keys *1x US Charger (Free EU Plug Adapter) *1X 18650 Battery