Electronic Mountable Outdoor Pest Repeller - 2018 Upgraded Battery Powered Ultrasonic Sound Eco Humane Home Lawn Yard Garden Bird and Bat Repellent Control w/ Motion Sensor, Light - SereneLife PSLBRP4 MOTION DETECTION: The SereneLife Electronic Pest Control delivers 12-35kHz ultrasonic wave that triggers high frequency sound and light flash to effectively repel pests. Works w/ unwanted outdoor animals like birds, bats, pigeons, pests and critters ECO-FRIENDLY: The bat repellent offers you an eco friendly and humane way of keeping unwanted flying animals outside your house without needing toxic chemicals. Safe, non-poisonous, and reliable. Perfect for garden, front or backyard and lawn use 2 MOUNTING OPTIONS: Offers you 2 mounting options - the system can be mounted on the wall or in-ground. Works day and night thanks to the built-in infrared detection sensor. Also features a rugged marine grade construction w/ IP-44 waterproof rating BATTERY POWERED: The repeller features a convenient battery powered design and requires 4 AA batteries (not included). The built-in speaker emits a safe ultra-high frequency alert which startles animals and prevents them from returning to the scene UP TO 30 COVERAGE: This pest eliminator device has a horizontal coverage area of up to 30+ ft w/ 110 wide-angle detection for your home and familys protection from outdoor pests. It has a . Avoid placing unit behind any large trees, wall or object