1. Negative ion purification, your personal housekeeper 2. Silent operation, environmental protection without loss 3. Configure the 7 million-level ion generator to continuously send and replenish the air vitamins to give the body aerobic exercise 4. Energy efficient, once charge, standby for long time 5. Built-in 180 mAh lithium polymer battery 6. Charge time: 20 minutes 7. Size: 46x57x20mm