The Yocan UNI Pro Universal Portable Mod is a variable-voltage box mod that physically adjusts to accommodate virtually any narrow vaping cartridge. Why Should you choose Yocan UNI Pro? Fully adjustable compartment for cartridge Patent-protected design Supports most narrow 510-threaded cartridges and tanks Recessed cartridge compartment keeps the cartridge from sticking out of the top of the mod Internal 650 mAh battery Fully adjustable voltage in 0.1-volt increments Automatically preheats thick oils and waxes The Yocan UNI Pro mod may make you never want to see another vape pen again. By the way, due to so may fan ask code recently, here are some big discounts for Yocan Fans. Yocan Evolve Plus only $39 (use YC4PLUS code) Learn more spec Yocan Evolve Plus Any questions, please comment below. Yocan Evolve Plus XL only $51 (use YC4PLUS code) Learn more spec of Yocan Evolve Plus XL If you have any confusion, please do not hesitate to contact us.