The body of the laser is made of aviation aluminum alloy, the strongest alloy of its kind available on the market. It also has a non-slip surface that makes it easier to hold the laser in your hand. The laser is perfect for home use and can also be used by professional services. The laser is locked by a special key lock against unauthorized activation, e.g. of children. Its beam is visible in daylight, and in contact with human skin can cause burns. Keep out of reach of children. The green laser is completely professional, all made of very good and durable materials (aeronautical aluminum alloy), so it is resistant to various operating and weather conditions. laser beam color: green laser beam distance: 80 km laser light wavelength: 532 nm laser diameter: 23 mm laser pointer length 162 mm weight without batteries 153 g Laser power supply: Li-ion battery included power charger to charge the battery manual push button switch key protection length: 16cm diameter: 2.25 cm battery 18650 - 6800mAh 3.7V In the set : 1x green laser 1x HT 18650 battery 2x security keys 1x AC charger