This product which you wear around your neck can help you enjoy fresh air wherever and whenever you are. This mini personal ionic air purifier hung around your neck, is very small with its weight only 55g. Just two AA batteries can supply its operation. Ions and active oxygen generated can increase the capability of carrying gas in blood and activate body cells to erase tiredness and improve metabolism. XJ-860 is your accompanying nurse to health. You can enjoy natural and fresh air as if staying in a forest at anytime and anywhere. Description: Model: XJ-860.Rated Voltage: DC 3V. Power Consumption: 0.5W/2AA batteries. Mini-size, easy to carry. Dimensions (mm): 92 x 49 x 29.Weight: 55g. Lon Output: ?1 x 104/cm3. Active Oxygen Output: ?0.04ppm. Wholly electronic circuit, low energy consumption. Ionic air movement, silent operation. Clean and fresh air, promote your health.