his 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.
350 MAH Battery
15 second preheat time for peak performance
Universal 510 threading
USB charger included