Using natural solar energy to operate 24/7, this motion-activated solar anima repeller by Scare-D-Pest™ emits sonic and ultrasonic sound waves to drive unwanted animals out of your yard or garden. No harmful chemicals, complicated wiring or costly electric bills ... and its high-frequency repelling sounds are inaudible to humans, offering safe, convenient protection. Simply mount this solar pest repeller on a fence or tree, or stake it in the ground with solar panel exposed to sunlight to repel moles, rodents and burrowing pests, day and night. Mole deterrent offers 20-ft. range of protection for yard, garden, patio, garbage cans and more. Solar panel requires 4 AA batteries (not included). Plastic, metal. 3 1/2" L x 15" W x 5" H.