The Passive Infrared sensor(PIR) detects motion and triggers the electromagnetic waves speaker emitting a tone that people cannot hear but chases away common outdoor pest like dogs, cats. Features: It is weather-proof allowing it to work all year-round and in virtuallyall weather conditions . It uses solar power to recharge the batteries so its alway working. Solar powers design, eco-friendly. No noise, make your lifes more comfortable. 360 circle-scan insects repellent, multi-angle damage to the sensory system of rats and insects. Waterproof and can be used outdoors. Specifications: Color: green Material: ABS Battery: 1200mAh Item size: 420 * 152 * 130mm / 16.5 * 6.0 * 5.1in Item weight: 355g / 12.5ounce Package size: 150 * 130 * 95mm / 5.9 * 5.1 * 3.7in Package weight: 425g / 0.9lb Packing List: 1 * Mouse Expeller 1 * USB Cable