This purpose made UV LED 395-400nm curing light has a black aluminium alloy body, optical zooming lens for precision focusing & spot curing, powerful LEDs powered by a 3.7 volt 18650 (1800mAh) rechargeable battery (included). Located on the end of the light is the on/off push-button for easy thumb operation. The curing light has an impressive waterproof rating of IPX4. The compact size body (12.3cm X 2.8cm) is small enough to carry in a pocket and has a handy wrist strap so you always know where it is.