The Yocan UNI Mod features affordability, functionality, and practicality. The UNI Kit allows full customization of all cartridges and can adapt to any type, size, and length of any oil cartridge on the market. The key is its adjustable knobs located just right beneath the lips of the cartridge chamber and also an adjustable lever to adjust the height of the cartridge level so your oil cartridges will achieve a perfect fit.  UNI Box Mod :· Battery Type: Built-In 650mAh· LED Light Indicator· Adjustable Voltage· Adjustable Cartridge Holder· Preheat 10 Second· Compatible With Atomizers That Have A Diameter Of 6mm - 12mm INCLUDES :· 1 x UNI Box Mod· 1 x Magnetic 510 Ring· 1 x Micro USB Cable· 1 x User manual