Features: Solar Power Mole Mouse Mice Gopher Rodent Pest Repellent Chaser Brand New and high quality Completely powered by Solar Energy Easy and safe to use. No Poison, No Chemical. Idea pest control device to keep rodents away from your garden or lawns by utilizing both sonic wave sound and vibration technology Transmits ultrasonics every 30 seconds. Effective Range: 7000 sf / 650M2 Frequency: 400-1000 Hz Rechargeable battery included: 1.2V 600MAH Ni-cd Solar Panel: 4.5V45MA Important : Please allow two sunny days for recharging before first use. Firstly, please check the ground surface before using it. frozen soil, irrigated or waterlogged ground is not suitable. dig a hole into solid earth to place the device. the density of the soil will greatly affect the effectiveness of the device. the more solid the earth, the better the device will be functioning.