Simple and safe to use. No poisons, no chemicals.NiMH solar rechargeable battery.This mole remover has no effect on animals or pets.Solar Rodent Repellent is effective in an area of 650 square meters.Ultrasound stimulates them, simulates the dangers and keeps them away from the irradiated area.Ideal pest control device that uses sound vibrations and sonic technology to keep snakes away from your garden or lawn.Multiple pulses repel moles, constantly changing the ultrasonic pulses they emit, so snakes don't get used to them and move closer to your garden.Aluminum is a better conductor for repelling vibration and is placed in the ground to transmit the warning pulse through the ground.To optimize the use of the product, we strongly advise you to install 2 devices every 30 meters in land areas infested with rodents.Specification:Type: Animal repellentQuantity: 4 piecesmaterial: plasticgreenSolar panel: amorphous silicon 2V 60maBattery: 600 mAh rechargeable batteryFrequency: 400hz-50hzEffective working area: 400-800 square metersRated voltage: 1.2vRated frequency: 400Hz-50HzRated power: 0.1WSolar panel size: 7.0*9.0cmSize: 15*15*32cm/5.9*5.9*12.6 (L*W*H)Net Weight: 440.0g/15.5ozpackage:4 * Animal Repellent1*user manual