The Exxus Tap VV touch activated battery is designed to be simple and easy to use. The output power can be changed from anywhere between 3.3V and 4.2V. A single tap to the power sensor at the bottom activates the battery and in turn allows it to reach it's maximum level of power within ten seconds. The power sensor is also how you initiate voltage adjustment, preheating, and stopping the device. One tap stops the device's functions, two taps starts the preheating process, and three taps adjusts the voltage output. A side light display indicates the current voltage of the device. Blue means 3.3V, green means 3.7V, yellow means 3.9V, and red means 4.2V. With a 510 thread attachment component, the Exxus Tap can fit a large collective of tanks on the market.