General description This 4 Pack Solar Powered Mole Repellent utilizes ultrasonic vibrations to effectively repel rodents such as moles, voles, snakes, and rats. By emitting low-frequency sound pulses every 30 seconds, it leverages the hearing sensitivity of these burrowing animals to drive them away. Each unit covers an impressive area of up to 7000 square feet, making it advisable to use multiple units for larger spaces. Typically, it takes about 2 weeks for the repellent to significantly reduce pest activity in your garden. Technical specifications Coverage area: up to 7000 square feet Power source: solar cell Energy duration: 3 to 5 days on a full charge Material: waterproof ABS plastic Other information This device does not require batteries, eliminating the need for replacements. The waterproof ABS plastic housing ensures durability against harsh weather conditions. This repellent is safe for people and the environment.