This is the Absolute Xtracts brand 3 function vape battery with carrying case! With a simple click of the button you can switch between 3.6volts, 3.8 volts and 4.0 volts in one battery. NOT FOR USE WITH CCELL CARTRIDGES!** All prices include a 15% CA Excise Tax, Oakland Local Tax (since we are licensed out of Oakland), and your local Sales Tax!