The Yocan Uni Pro is a small and portable box mod that fits a wide variety of atomizers. Its OLED screen shows you battery life, so you know when it's time to charge and shows you a puff counter, temperature, preheat, and even if you forgot to add a cart. Easily switch between 2.0-4.0 volts depending on the type of hit you like and consistency of what is in your cartridge. This awesome device can also be adjusted to fit different heights and widths of carts. The innovative hanging hole lets you hook it to a lanyard and carry it around with you. This device has a 650mAh battery and recharges quickly with a USB-C cable.