Covers up to 7,000 Sq. Ft. 1 Pack mole repellant spikes cover approximately 40 feet in radius, an area of 7,000 square feet. Emits pulse every . This is a piercing Ultrasonic pulse and vibration that penetrate the soil underground, which not physically harm these , only let them feel uncomfortable and escape. Safety and environmental protection - Harmless to the environment, . Eliminates the use of mole traps, mole or mole . No molehills appear in your yard - Solar Mole Repellent is an environmentally friendly way of minimizing damage to your farm, garden, lawn or yard caused by moles, voles, shrews, gophers, and destructive ground rodents Efficient Solar Powered - A high-tech solar panel is built in the solar mole repeller. The battery recharge from the solar panel automatically. A full solar charge in full sunlight for around 4 hours enable the repellent to operate for 4 days even in unfavorable weather without interruption