Ultrasonic Repeller This is our premium version. Using the principle of ultrasound, the frequency is changed to stimulate the auditory system of mosquitoes and other pests, making them intolerable and uncomfortable. Easy to use Electronic Mosquito Repeller is a plug-and-play device -play. As long as it is working, the breathing indicator light will be on. For best results, but installation time may be determined by the type of pest. Environmental protection and safety The product is non-toxic and environmentally friendly, our insect repellent is 100 % safe and effective, and the ultrasonic frequency emitted by this machine cannot be heard by humans and pets. Safe for children, families and pets. However, if you have pet hamsters in your home, do not use this ultrasonic mouse repeller. Versatile Mouse Repeller The ultrasonic mouse repeller is suitable for repelling mice, cockroaches, spiders, insects, mosquitoes, insects and ants. For many pests, you can only use this ultrasonic