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.