AiroPro’s innovative 500mg ceramic cartridges are pre-filled with high-potency pure distillate oil. BATTERY TYPE: AiroPro cartridges use a proprietary Airo Pro/IndigoPro pen. Durable, virtually-unbreakable magnesium alloy body and long-lasting 320mAh Li-ion battery. 8.5 W power output, 300mA (1.5W) charging current, Micro USB rechargeable."