LeaveMeBe Ultrasonic Bird and Animal Solar Repeller Electronic Humane Repellent Batteries Included, Waterproof, Keep Birds Away SENSOR RANGE DETECTION / NIGHT TIME: The on this device can pick up any moving object from 30' away and 110 angel. Night time operation in any mode just like day time. Please allow the unit to be in the open sun light for 2 days to get the full charge 3 MODE OUTDOOR ANIMAL REPELLER: This humane bird repeller, features 3 modes for different types of outdoor pests. The device is equipped with motion sensor and when the unwanted animal crosses the sensors the device will scare it away with ultrasonic waves or 1 of 7 different sounds installed on the repeller. INSTALLING THE REPELLER: The repeller can be placed directly in the ground in the desired area, using a spike included in the purchase. Or it can be hung on a wall by a nail or screw. EFECTIVLEY REPELS & KEEPS BIRDS AWAY: Foxes, Birds, Deer, Raccoons, Armadillos, Opossums, Skunks, Cats, Dogs, Rodents, Bats, Geese. Keeping your yard or garden free of unwanted pest. SOLAR CHARGER: The device comes with 4 rechargeable AA batteries, that recharge through the solar panel on the device. If the repeller is not placed in direct sun light it can be powered by an AC adapter (NOT INCLUDED).