Great Vapes, Better Price! Good Supply 510 Battery Kit Features and Includes: - 510 threading that pairs with all 510 carts (*Cartridge Sold Separately*) - 400 mAh Battery with 10 second draw capability - USB Charger included (USB-C ports not recommended to charge unit) -USB Charger has an Input DC 5V and Output 4.2V - Five quick clicks will turn the unit On/Off - Three heat adjustment levels with three quick clicks of the button *White = Low Heat (2.8V) *Blue = Medium Heat (3.2V) *Red = High Heat (3.7V) - Two clicks will activate a ten second Pre-Heat function for hands-free use, and one click to end Pre-Heat when selected Dimensions: Length: 80mm Diameter: 11mm Weight: 20g *Avoid laying unit horizontally when an active 510 cartridge is attached to the unit. Also avoid taking strong hauls as that can cause the cartridge to become clogged with distillate oil. To relieve a clog set the battery button to high (red) and hold it down for the full ten seconds. Gently begin to puff on the cartridge while holding down the button. Repeat the process until the unit becomes free of the clog.