Comes with 4 different modes to suit different environments and goals. The effective range of the ultrasonic repeller is longer than traditional repellers. You'll need to leave it on for a while for a more pronounced effect. BEST CHEMICAL ALTERNATIVE: Immediately dispose of chemical rodenticides that are potentially dangerous to you, your children, and pets. Our product is an effective rodent repellent, rats and rodents will leave your home immediately after being disturbed by the ultrasonic waves emitted by the transmitter. We humans and pets can't hear similar sounds at all, you can use it with confidence. Multiple options: 4 modes, test/super/transparent/dual, effectively scan an area of 50-60 square meters, this mouse repeller is suitable for indoor scenes such as garage/restaurant/office building/garage/attic. After on-site testing, the anti-rat frequency range: 25KHz-65KHz, sound pressure: 90dB, friendly to cats and dogs, not affected. Suggestion: If there are more than two mice, mice, mosquitoes, etc. at home, it is recommended to turn on the DUO mode directly, the effect will be more direct, it will quickly disturb the hearing of the mice, and at the same time confuse them to achieve the purpose of going out.