The newest ultrasonic chip technology, the ultrasonic machine stimulates the sensory system and nervous system of pests. Make them want to escape from this place. This ultrasonic pest repeller is no noise, non-toxic, tasteless. Get rid of mouse, mosquitoes, spider, stink bug, ant, roach, bat, and other harmful insects by repelling them. So Insect repellent will not harm children and pets when used. There is no noise during use, ensuring you work and sleep quietly. Lights up when the product is working, Blue light can increase the safety of users at night.