Ultrasound Prevention: Emits a sound wave every 20-30 seconds. This device works with an intermittent vibration generator that emits vibration and ultrasound between 400 Hz and 1000 Hz Solar energy saving: Solar panels provide enough energy by absorbing light, so no batteries or charging additional is required. It’s much cheaper than battery-powered bugs. WATERPROOF AND DURABLE: This solar insect repellent is waterproof, so you don’t have to worry about it not working on rainy days. Corrosion resistant and will not contaminate the floor even after long hours of work. Effective and Safe: No annoying chemicals or pesticides, no traps, no dead animals. It will not disturb your cats, dogs or other pets. ECO-FRIENDLY: Ultrasonic mouse repellents can effectively kill hamsters, voles, snakes and other destructive rodents. The device emits vibrations in the ground, which disturb the animals and seek a more comfortable place. Description: Materials: ABS Frequency: 400-1000 Hz Size: 26.5 x 6.5