Our variable voltage battery will work with all Raw Garden 510 threaded cartridges. Press the button 5 times in quick succession to turn the battery on/off. Adjust the temperature three different ways to optimize your flavor experience: 2.9V = Blue LED 3.1V = Green LED 3.3V = Red LED Press and hold the button down while inhaling on the cartridge mouthpiece. Release the button to deactivate and stop inhaling. Rechargeable with USB adapter.