Compatible with: 510 TanksA simple variable voltage vaporizer with 510 threading that comes in beautiful retail ready packaging. The voltage settings are easy to change by simply clicking the button 3 times. The slim design of this battery tapers off to help make any 510 cartridge sitting on top of it look great. The package includes a USB charger.Battery Capacity: 350 mAhThreading: 510Includes USB Charger: YesPower Method: 5 button click on/offVariable Voltage: 3 button click Variable VoltageGREEN = 3.4VBLUE = 3.7VRED = 4.0V