The product uses ultrasonic sound technology to deter without harm a wide range of animals including dogs, cats, bird, pigeon, foxes, squirrels, deer, rats, mice, elephants etc.The product does not affect people, fish or birds.This product is for use outdoors and is safe for use in all weather conditions.The motion activated animal repeller is use solar energy.The animal repeller is use ultrasonic wave.UK Solar Repellent Cat Repeller Scarer Dual Ultra Deterrent Garden Animal ChaserPower Supply: 3 x "AA" NiCD rechargeable batteries (Solar panels and 3 x AA batteries are included)Power Consumption: Standby = 0.8 mAh,working = 15mAhUltrasonic Frequency: 18-40KhzCoverage Area: 30 feet@1100 = 2,425 square feetColour: Army GreenMaterial: ABSPackage Contents:2 x Animal RepellerOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.