Yocan UNI Pro Box Mod features universal compatibility with all oil atomizers at all length and size, fully bring customization and personalization to the next level. UNI Pro Mod :· Dimensions: 75.5mm x 25.7mm x 36.5mm· Battery Type: Built-In· Voltage Output Range: 2.0V - 4.2V· Fit all cartridges· 10sec Preheat Function· Built with hanging hole INCLUDES :· 1 x UNI Pro Box Mod· 1 x User Manual· 1 x Micro USB Cable· 1 x Magnetic 510 Ring