Features: • Variable Voltage • Preheat • USB C Charging Specifications • Battery Capacity: Slim - 350mAh, Mini - 400mAh, Flat - 650mAh, Plus - 900mAh • Battery Charge Type: USB C • Compatible Resistance: >0.8? • Voltage Levels: 2.6V - White, 3.2V - Green, 3.8V - Red • Preheat Level: 1.8V • Preheat Duration: 10 Seconds • On/Off: 5 Clicks In 2 Seconds • Change Voltage: Click Button 3 Times Quickly • Preheat On/Off: Click Button 2 Times Quickly