Smart PIR & Automatically Activated: The built-in PIR sensor detects a presence in the front area within a 110° radius up to 8 meters. The dog repeller automatically activates and emits ultrasonic sound if animals come into its detection area. Effective in driving away most animals, such as cats, dogs, rats, rabbits, squirrels, raccoons, martens and foxes, etc. Effective Animal Repellent: The ultrasonic cat repellent is equipped with powerful ultrasonic speakers, which can scare animals with ultrasonic sound and make them uncomfortable. In addition, it is harmless to humans, the environment and pets, thus protecting your home in a safe and environmentally friendly way. Solar Charging & IP44 Waterproof: A solar panel is placed above the mouse repeller which can be charged by solar energy in the sun, efficiently charged to maintain a long standby time all day long. Its waterproof rating reaches IP44, can work effectively all year round in almost all weather conditions. Easy