Our variable voltage battery works with all Raw Garden™ 510 threaded cartridges. Easily adjust three different temperature settings to personalize your flavor experience. Rechargeable with USB Adapter.Press the button 5 times in quick succession to turn the battery on/off.Adjust the temperature in three different ways to optimize your flavor experience:2.9V = Blue LED3.1V = Green LED3.3V = Red LEDPress and hold the button down while inhaling on the cartridge mouthpiece. Release the button to deactivate and stop inhaling.