WARNING: Do not use ozone in occupied spaces. Operate only in unoccupied, enclosed areas. After use, ventilate thoroughly before people or pets re-enter. all instructions in the user manual. This portable ozone generator is designed for odor treatment in enclosed spaces such as closets, cabinets, bathrooms, pantries, basements, garages, corridors, and vehicles. For refrigerator use, remove food items first, operate only when unoccupied, and fully ventilate before placing items back. Choose between two ozone output levels (50 mg/h or 100 mg/h) and select a working mode that fits your situation: Hold mode, 30-minute operation, 5 minutes ON + 55 minutes OFF cycle, or light-sensor operating cycle. Power is supplied through 5V USB input from an external power source (USB wall adapter or external USB power supply). The device contains no built-in rechargeable battery and does not store energy. For Unoccupied Enclosed Areas -- Use for odor treatment in unoccupied enclosed spaces such as bathrooms, closets, cabinets, pantries, basements, garages, corridors, and vehicles. Ventilate thoroughly before re-entry. Two Ozone Output Levels (50 / 100 mg/h) -- Selectable ozone output levels for small enclosed-space treatments. Choose mode/time based on space size and odor intensity. USB Powered (Input Only) — No Internal Battery Runs on 5V USB input from an external power source (USB wall adapter or external USB power supply). No built-in rechargeable battery; device does not store energy. 4 Operating Modes + Portable Size -- Hold mode, 30-minute run, 5 min ON/55 min OFF cycle, and light-sensor cycle. Compact body for travel and multi-location use. Built-in Fan + Metal Shell, Easy Maintenance -- Internal fan helps circulate output for more even distribution. Metal housing with internal fan/filter structure supports durability and routine cleaning.