(Upgrade Litter Deodorizer) Deodorizer adopts the new technology of deodorization, powerful deodorizing over 99% of odor from the litter. Once the cat litter deodorizer is turned on, its sensor continuously monitors the usage of the litter box until the battery runs out. (100% Cat Friendly and Fragrance-free) Very friendly for both you and the pets, litter box air deodorizer built-in a high-sensitivity biosensing system, when the cat approaches, will automatically turn off and automatically turn on when the cat leaves. Smart care for pets. (Small and Portable) Cat litter box deodorizer equipped with USB input, and convenient to carry out, up to 7 days of use on a single charge. No consumables, no filters, zero waste, and reusable! Feature: --The release of high activity negative ions from the Cat Litter Deodorizer absorb dust and tiny ashes resulting in a better air quality environment. --Cat Litter Deodorizer is non-toxic and safe, it also removes bad odor and refreshes the air while decomposing odor molecules like nitrogen, hydrogen & sulfide. Specification: Deodorizer Details: Weight: 182g Size: 3.7*3.7*9.3mm Deodorization Rate: 99% Dust reduction Rate: 99.9% Operating Hours: 24h/7d Battery Life: up to 7 days one a single charge Charging Method: USB Powered( 5v input) Please Note: * The odor may not disappear completely on the first day of use, but after 2-3 days, you will feel a significant difference; *For better odor control, place the deodorizer in the litter box or closer to the box; *When cleaning the litter box every week, you can take out the cat litter deodorizer and charge it.