The ultrasonic repeller does not use any harmful or toxic chemicals to repel rodents without harming themselves. The exterior insect-proof zone embeds itself in the ground to start its functions. The snake repeller is also made of high quality ABS material, so it brings a stable feeling when gripping and ensures maximum durability and longevity. For best performance, we recommend placing the mole repellent every 90 feet of your lawn. The sound pulses emit sound pulses every 30 seconds, they penetrate the ground and also force the pests to evacuate the area through which the sound travels. Generally, it takes about 2-4 weeks for the moles and gophers to be driven from your garden. Your garden will be free of rodents.Relax knowing your lawn is protected even when it rains due to the waterproof and corrosion resistant features of the mole and vole repellent spikes. Aiming to keep our environment clean, we lead to the use of ecological energy: solar energy and rechargeable battery for the pest repellent. It can absorb the sun for daily use. In the absence of sunlight, this mole trap has a battery charge of 3-4 hours and provides 5-7 days of use. Colour: Black Size: as shown Include: 2* mouse repellent