The Sol Mate Sonic Mole & Gopher Chaser repels unwanted burrowing rodents with the strongest and least expensive power available - the sun. Solar-powered and maintenance-free, the Sol Mate Solar Mole & Gopher Chaser uses state-of-the-art technology to repel moles, gophers, voles, shrews and other destructive burrowing rodents.This ingenious device is environmentally friendly and eliminates the use of poisons and traps around your children and pets. Since one full charge yields up to 5 days of trouble-free power, the unit is capable of operating even in unfavorable weather without interruption. The solar panel is embedded in a watertight housing with a unique mow-over design and is constructed of strong ABS material with its discreet green color fits into any environment.The Sol Mate Solar Mole & Gopher Chaser produces a sonic pulse of approximately 400 Hz every 30 seconds and covers an area of approximately 7500 square feet (1/6 acre). Pets won't be affected, but rodents find the noise irritating and eventually move to quieter surroundings.