LUCKYSUN Cree L2 LED 3C Color Warm Light 20mm Diameter Plus 20mm XML Flashlight Driver 3.7V 4.2V Torch Circuit Board Drive package comes with one cree xml2 and one 20mm flashlight driver Output:10W Driver Input Voltage: 3.7V-4.2V(one lithium battery ) 3C color temperature CREE XML2 Application: LED flashlight torch DIY