Product Description SOLAR SONIC SPIKES REPEL MOLES, CHIPMUNK AND GOPHERS WITHOUT CHEMICALS OR POISONS. Our state-of-the-art solar-powered ultrasonic waves repellent system effectively prevents pests from damaging your land and coming into your lawn, yard, farm or garden. They are a preventive method that also doesnt harm the environment. Our upgraded repellers - 4pcs - these are hardware with a sensor giving vibrating a pulse working as a pest's remover. This is a great premium choice and excellent safeguard for your lawn and camping. You do not need expensive traps. Read more SOLAR PANEL Solar panel - 2V/70mAh monocrystalline silicon. Battery - 1.2V/600mAh Ni-MH battery. Frequency - 400HZ +/- 50HZ. MATERIAL Material - ABS plastic. SWITCH ON/OFF switch. Read more To use, make a pilot hole in the ground with a wooden or steel rod. Next, insert the Spike into the soil so that the cap is flush with the ground to avoid tripping hazards and the chance of hitting it with a lawnmower. Then press the ON/OFF button, then it will work for every day. When placed in the ground and activated, sonic pulses penetrate the soil every 30 seconds, emitting a sound which is highly irritating to moles and gophers, mice, voles, snake and other rodents. Keep your garden, yard or farm in order! Read more Gopher Repellent Ultrasonic Solar Powered 2 Pack Solar Mole Repellent Ultrasonic 2 Pack Outdoor Powered Sonic Deterrent Solar Mole Repellent Ultrasonic 4 Pack Outdoor Powered Sonic Deterrent