To Operate: Attach your vape cartridge . Press the button 5x to turn on and off. Hold button and puff to prime oil. Once flavor is flowing, your cartridge is ready! Press button 3x to cycle through heat settings. Low vapor production may indicate low battery.--To Charge: Separate vape cartridge from battery. Plug in USB cord. Plug into USB power supply. Battery light will indicate charging, light will shut off when charging is complete.--*Variable Voltage Battery (White Light = 3.0 volts) & (Yellow Light = 3.6 volts )*