Specifications: Material: stainless steel case Power: direct current Type: ozonator Ozone production: 32g / h Noise: ≤30dB Formaldehyde removal rate: 99.99% Usage condition: household Benzene removal rate: 99.90% Power consumption: about 120W Power cable length: approx. 1.30m Item size: 182 * 230 * 130mm / 7.2 * 9.1 * 5.1in Item weight: 1830g / 4.0lb Package size: 310 * 220 * 180mm / 12.2 * 8.7 * 7.1in Package weight: 2176g / 4.8lb About use: At first, you have to plug in the machine, then adjust the timer machine will s-tart working. For example, if your room is 20 square meter, adjust the timer with 10-20 minutes is ok, if your room is larger adjust the timer with more minutes accordingly. During machinersquos working, animals or human should not stay in the room. When machine finished work, make theroom ventilate 15-20 minutes. Note: Please allow 1-30mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Packing List: 1 * Ozonator