The Ultimate Variable Voltage Battery. Engineered to provide the best Heavy Hitters vaping experience for Ultra & Live to preserve the flavorful terpenes and extend the life of the cartridge. Easy To Use | Choose Your Ideal Temperature | Button Activated | 3 Voltage Settings: 2.0v, 2.5v, 3.0v Pro Tips: LIVE by Heavy Hitters is best enjoyed at 2.0v (Blue light) For a fuller hit, fused with flavor try 2.5v (Green light) For an Ultra Heavy Hit select 3.0v (Red light) Compatible with all 510 thread cartridges, Micro-USB cable included How To Use: Power On: Click square button 5x rapidly , Blue light blinks 3x , Hold button & inhale Switch Voltage: Click button 3x to cycle through settings Preheat: Click button 2x to initiate 10-seconds pre-heating LED light cycle