Keep your cat's environment fresh with the Air Purifier Smart Spray. This sleek white device ensures clean air for your pet. Includes K3 smart spray and two spray refill bottles. PETKIT K3 Smart Spray Odor Remover for PuraMax and PuraMax 2 Automatic Self-Cleaning Cat Litter Box, Bluetooth Connected, App Control Smart App Control: As a pet odor remover, you can control it through the PETKIT app.Remove odor automatically after self-cleaning or scheduled via Smart Lighting System: Turn on/off the light via App and check the litter box in dark. Detachable and Easy to operate: Equipped with mark-free glues, it can be installed on multiple usage scenarios.