Not only an simple ozone generator, but also can be use as an simple sterilization machine, because it can kill most harmful bacteria effectively. High effeiency ozone can prevention of infectious diseases, remove dust and fresh the air easily. Fit for home, offices and rooms, smoke and pet areas, musty basement, car, etc. Feature - Color: As Shown. - Material: Plastic+Electronic Component. - Size: 11.5 x 7.4 x 7.4cm. - Working voltage: DC3.7V. - Power: 0.5W. - Ozone concentration: 5mg / h. - Battery capacity: 2100mA. - Can be use as an simple ozone generator, but also an sterilization machine because it can help you clean your food and fruit more clearly. - 0.5W low consumption and energy saving. - Kill bacteria on the surface ozone by inhibiting the metabolism of fruits and vegetables,cooked and after postpone aging, extend the food, fruits, vegetables insurance time. - Eliminate odors: Ozone can rapidly decompose a variety of odors and odor in the refrigerator anaerobic microorganisms breedinggenerated bit string to avoid food. - Portable, easily transported from one room to another room. Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand