Clearly marked voltage setting that you will not need a magnifying glass to see.
3.3V to 4.8V smooth turning voltage adjustment dial.
Short Circuit protection
5 Click on off button
Works with 510 and EGO gear.
Low Voltage Protection: When the battery voltage is lower than 3.2V, the battery will shut down.
5-click On/Off lock feature; Press the button 5 clicks within 2 seconds and activate the battery or turn it off.
Using the battery at a higher voltage output will drain the battery faster than at a lower voltage. We suggest you to start with a low voltage and increase the voltage gradually until you find the right voltage for your atomizer/cartomizer.