1. 【Powerful Deodorizing Function】The cat litter deodorizer adopts a new deodorizing technology, which can effectively eliminate the odor in the cat litter box. After turning on the cat litter deodorizer, its sensor will continuously monitor the usage of the cat litter box until the battery runs out and automatically remove the odor to keep the cat litter box smelling fresh. (The odor may not completely disappear on the first day of use, but you will notice a significant difference after 2 - 3 days.) 2. 【Cat - Friendly】The air freshener is equipped with a bio - sensitive element. When a cat approaches the air freshener, it will automatically turn off, and when the cat leaves, it will automatically turn on. 3. 【USB Rechargeable Battery】The cat deodorizer does not require expensive replacements or filters. Our cat litter deodorizer is powered with low energy consumption. It uses USB charging and can work for up to 7 days on a single charge. 4. 【Multi - Functional Use】For cat litter boxes. The deodorizer is specially designed for small spaces where odors come from cat litter boxes, pet pads, shoe cabinets, kitchens, bathrooms, closets, living spaces of other pets, etc. Place our cat litter deodorizer inside or near the area with odor to keep your home and your pet's home smelling fresh. (Extra quiet) Thanks to the noise - reduction design, the noise of the device is below 20 dB, so your cat won't be disturbed. 5. 【Sturdy Snap - On Design】The cat litter box deodorizer uses a lid. The snap - on lid has strong double - sided tape and can be hung on any surface you choose. So you can easily insert the air freshener into the lid by twisting, but the cat can't scratch it.