1. Fridge Deodoriser and Freshener: Our small USB rechargeable air purifier, designed for your fridge, freezer, and more, utilizes ozone to effectively reduce mixed odors. It quickly neutralizes stubborn smells, preserving the freshness of your stored items. 2. Enhanced Food Freshness: By releasing ozone ions, this smart air purifier improves air circulation and extends the shelf life of your food, preventing decay and spoilage. Use it in your refrigerator, freezer, shoe cabinet, wardrobe, car, pet room, and more for fresh, clean air. 3. Convenient USB Charging: Powered by a USB connection, this deodorizer is incredibly easy to recharge. With a 30-day battery life in Freshness Preservation mode and 3 days in Strong Odor Removal mode, it ensures consistent odor control without frequent recharging. 4. User-Friendly Operation: Enjoy simple and hassle-free operation with intuitive controls. A 3-second press powers it on, a single click switches between modes, and a 2-second press turns it off, entering power-saving mode. 5. Portable and Compact: This portable ion air purifier is compact and lightweight, suitable for both home and travel use. You can move it around effortlessly, saving valuable space in your refrigerator, shoe cabinet, wardrobe, or even your car. Product parameters: Material: ABS plastic + metal color: White Voltage: DC-5V Power supply mode: USB Key Function: Press and hold for 3 seconds to turn on, click to switch working mode, press and hold for 2 seconds to turn off.Enter power saving mode after shutting down. Operating mode: First gear: normal mode Second gear: powerful mode Battery life: normal mode: 30 days powerful mode: 3 days