This Variable Voltage Battery w/ Preheat works great with prefilled oil cartridges or wax atomizer tanks.
Offers 3 color coded voltage settings: Red / 4.0V, Blue / 3.7V, Green / 3.4V.
Click 5x to turn on, click 3x to change voltage, click 2x to preheat for 15 seconds, click 1x to use.
Note: Cartridges sold separately.