The KeyBD Neo offers a discreet way to conceal your 510 threaded Oil or Wax tank. Its design, inspired by key fobs, allows for discreet carrying. You can easily adjust the power setting with precision thanks to the OLED screen. The rubberized finish provides a comfortable grip. Inside, the updated KeyBD NEO has a 650 mAh battery and a chip that allows for a range of 2.6V to 4.8V adjustments.