[Security; and environmental protection] The insect repellent; mouse ultrasonic uses high quality eco-friendly ABS. No annoying chemicals or pesticides, no traps, no dead animals. [Ultrasound Prevention] Sound waves are sent every 20 to 30 seconds.The device works via a vibration generator intervals to send vibrations and ultrasonic waves from 400 Hz to; 1000Hz. 【ÉSolar Power Saving】Built-in high-tech solar panels, the mosquito repellent can be automatically charged. to from solar panels. Solar panels provide enough energy by absorbing light, without the need for additional batteries or charging. It is much cheaper than insects. batteries. [Effective and safe] This kind of interference will force pests to force them to evacuate the area, as they think it is a danger, then to hunt them. Sound waves do not harm pets or children. [Waterproof] Made to from high quality materials; environmentally friendly, it has good waterproofness. and do not fear the rain. Note: Do not immerse this