Fdit is a selfless and careful home-kitchen supplies craftsman,he devotes himself to provide the top-notch home-kitchen supplies to the common folk.We take each order seriously while our customers choose our product, because it is about your convenient life. This is not a joke,we believe you care your family greatly! Descriptions: Our Mini air cleaner sterilization can help to eliminate and retard mold, mildew, fungus growth and provide a fresh clean atmosphere in refrigerator. And it's mini size is space-saving, compact and portable for your convenience anywhere. It's a great travel, car,home helper. Specifications: Specifications: Function: Sterilization and deodorization Material: ABS+Metal Paint Grille Color: green/blue/pink/black/yellow/white Battery Capacity : 700mAh Output current: 40mAh Charge time : 3h Rated power: 1w Product voltage: DC/5v Size: (D x H): 90mm x 30mm Weight: 180g Package include: 1 x Doughnut Air Purifier 1 x USB Cable 1 x User Guide 1 x Hang Rope Note: 1.There are many factors may affect the purify results, such as putting too many irritant odor foods, open refrigerator regularly, purifier power off,etc. Please ensure it working in a normal environment. 2.Please place the device into the top layer inside refrigerator, thus to ensure a better working efficiency. 3.When used for refrigerator, please place the device in the cooler chamber, not in the freezer. 4.Please do not take out the product regularly due to the temperature difference , thus to ensure it a longer service life.