These Pulsar VV Auto-Draw 510 Batteries offer four variable voltage settings ranging from 2.5V to 3.7V. Auto-draw activation makes taking a puff easier than ever! The 280mAh batteries are capable of sustaining an average of 200 puffs per charge. Universal 510 threading ensures that this vape can be used with most standard vape cartridges. To operate, simply tap the base of the battery 5 times to turn on/off, tap 2 times to activate the pre-heat function, or tap 3 times to change the voltage. Sold as a 12-piece display. Multiple color options available.