The DAZZVAPE U-Key Concentrate Vaporizer is an ultra compact concentrate vaporizer with single button operation, internal 350 mAh battery, and direct voltage output. The U-Key will operate at the highest available voltage based on current battery life. The currently level of output is indicated with the four red LED lights under the bottom of the device marked at 4.0V, 3.6V, 3.2V, and 2.8V. The U-Key has an atomizer resistance of 1.0 to 3.0 ohm. The U-Key has a 350 mAh battery that can be charged through a micro-USB port. This vaporizer is compatible with 510 threaded cartridges (sold separately) and features a press-to-open folding design. The U-Key is made of a combination of zinc alloy, litchi grain leather, and ABS material. The DAZZVape U-Key is an excellent travel sized device with a convenient key fob aesthetic.