Product Features CAPACITY: 650mAh Variable voltage battery. VOLTAGE- When 3.4v, LED green, when 3.7v, LED blue; when 4.0V, LED red. INSTRUCTIONS- Press 5 times for On/Off. 3 times adjust voltage. 2 times to preheat. PACKAGING CONTECTS-650mAh VV Battery device,wax cartri,oil cartri,2-magnetic connector, Glass oil Syringe,dab tool,USB cable and user manual.