Simple to Operate Clear display, simple function and easy to use. 10 Second Fast Cure Use high power 5W LED, can cure composites over 3mm in 10 sec. Never Shutdown Within Continuous Use Built-in smart heat-management system, will not over-heat with continuous use. Combo of Cordless & Cord Types When the battery power is exhausted, plug-in the power supply and use it immediately.Specifications: Power supply Input: AC100~240V, 50/60Hz Output: DC 5V/2A Mini USB jack Battery 3.7V, 800mAh, type: Lithium-ion Light source Latest Generation 5W LED The range of wavelength 440nm~480nm, peak:460nm Radiant intensity 1000mw/cm2 above Light guide rod.