UNI Pro Features: 1. Yocan Patented Design 2. Fit Your Favorite 510 Heating Elements 3. Customize Voltage Option(2.0V to 4.2V) 4. Universal Box Mod & Product Level Window 5. Compact And Portable 6. 650mAh Battery Capacity & USB Charging 7. 510-Threaded Magnetic Connection 8. Adjustable Chamber Height And Width 9. 15 seconds cut-off 10. Preheat Mode: Click the power button 2 times 11. OLED Display 12. Built With Hanging Hole