SereneLife Waterproof Solar Animal Chaser, Electric Pest Repeller, Solar Animal Repeller, Outdoor Motion Detector, Pest Control, Ultrasonic Sensor, Coverage Area: Up to 30'+ Ft, Green (PSLBAR8) OUTDOOR USE: Best for yard and patio use, covering up to 30 + square feet. It works for unwanted bats, birds, pigeons, pests, critters & more for gardens, backyards & front yards. ECO-FRIENDLY: To ensure a healthy home, this solar power pest repeller is constructed as an Eco-friendly pest eliminator. It does not use any chemicals or harmful substances. The ultrasonic frequency serves as a trap that lures in pests. DURABLE WATERPROOF CONSTRUCTION: The solar power ultrasonic pest animal repeller is made of rugged, marine grade IP-44 construction, making it perfect for yard use. MOTION DETECTION: The solar pest repeller works via motion detection triggers than emit a safe ultrahigh ultrasonic alert and light flash that repels several small pests, from birds to rodents. FOR BOTH DAY & NIGHT USE: The eliminator pest repeller works perfectly both day and night thanks to the built-in IR infrared detection sensor. Four AA rechargeable batteries included.