Description: ASEPTIC LIFE - Donut ozone air purifier can break down the air free bacteria make it inactivate and killed the bacteria, it can prevent the diseases which use air as a medium of infectious, prevention hepatitis, tuberculosis infection FASHION DESIGN - Mini donut shape and space-saving, compact and portable for your convenience anywhere and 10 dB quiet operation. So that you can enjoy a aseptic life while becoming a fashionista STRONG STERILIZATION - Effectively kill the bateria in different and purify odor. Great for use in the home, office, fridges, bathroom, wardrobes, cars, closet or any space with limited airflow. And not require to replace any filters LONG BATTERY LIFE - USB interface, 700 mAh large-capacity lithium battery can be used for a week, sustainable removal of air pollutants such as and bacteria to keeps indoor air fresh SIMPLE OPERATION - Press the switch button to start automatically, the indicator light is blue and without any other operation (For more detailed instructions, please read the user manual carefully) Specification: Material:ABS Plastic Diameter: Approx. 9cm/3.54inch Thickness: Approx. 3cm/1.18inch Battery Capacity : 700mAh Operating Temperature : -10-50 Applicable Area : 2 Ozone Concentration : 2mg/h Rated Power:1 W Voltage: 5V Package Includes: 1 Piece Doughnut Air Purifier 1 Piece USB Cable 1 Piece User Manual 1 Piece Rope Note: As different computers display colors differently, the color of the actual item may vary slightly from the above images. Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid.