Solar Powered — For optimal performance, we recommend placing a rodent deterrent every 96 feet of your lawn when setting up your garden. It emits a 3-4 second sound pulse every 40 seconds, which penetrates the ground and chases the pest from the area where it is located. sound is transmitted. Safe to Use — Humane and safe to use. proximity pets and children Anti-mole spikes ward off moles by emitting a sound pulse. They do not harm no animals in any way, as they contain no chemicals, poisons or hazardous ingredients. Effective and wide coverage — The repellents at antiparasitic ultrasounds emit pulses at low frequency for 3-4 seconds every 20 seconds, which penetrate the ground and prevent moles from entering protected areas, as moles are sensitive to noise and vibration and is an effective method of preventing them from damaging outdoor areas such as lawns, yards and gardens. Powered by solar energy–economical and safe—High quality polycrystalline silicon solar panel