LED feature! The Vuber Pulse is a dope new patented smart battery that reads the resistance of the 420 cartridges and automatically adjusts the settings for optimal use. All you have to do is attach your cartridge and start taking a draw. The Vuber Pulse enhances the flavor profile of your concentrates, increases the size of the vapor hit and regulates the temperature to prevent the user from burning the cartridge out. It also features Vuber’s patented “Never Burn” technology, that tapers the heat voltage as you draw, assuring that the user gets the best tasting hit every single time they have a session. The Pulse has an LED screen that shows battery life, resistance, voltage, and wattage. It can also be put into manual mode for those that want to dial in their own temperature settings. As an added bonus The Pulse can be used while charging, assuring no delay in your vaping experience! You will love the Vuber Pulse.