How It Work: The pest repellent ultrasonic plug in emits powerful ultrasonic sounds and pulse wave that disrupt rodents' brain system; Built-in LED flashing lights disturb their activity in a dark environment, being extremely irritating to rodents andpests; This ultrasonic pest repeller makes the area uncomfortable for rodents and bats to be in, then they will run away from your house 3 High Efficient Repelling Options: The mice repellent plug-ins use modern microelectronics technology, designed with 3 types of special ultrasonic waves modes; Except Test mode for simulating the sounds that pests hear, and checking the ultrasound worksor not, there are 3 repelling modes (ULTRA, TRANS, and DUO) to switch to drive squirrels, mice, rats, and bats away effectively Easy-to-use and Maintenance-free: Easy to set up, after plugging the unit into power, the mouse repellent will start working immediately; Lasting a long time, it stands the extreme heat and cold of sheds, shops, and garages; There is a working indicatoron the top of the ultrasonic mouse repellent, Blue/ Green/ Blue-green showing it is on different mouse deterrent ultrasonic mode Efficient Protection of Property: Place the pest repeller rat repellent in the Attic, Garage, Basement, Room, Storage, RV, or any indoors 100-240v available; Save your money for rodent control, and prevent your property in mice damage, repelling squirrels,mice, rats, and bats from your home, get peace of mind by a simple way Mini Size, Max Coverage: Effectively repels rodents, bats, and pests with a powerful wide coverage. The electronic mouse repellent device is effective within an indoor area of up to 1067 sq. ft; Since ultrasound can not penetrate through walls and solidobjects; Plugging one ultrasonic mouse repellent in one space free of obstructions is what we recommended Long-lasting Rodent Deterrent Process: Sometimes the rodents may be more active during the beginning of use showing that the rodents are irritated; After a prolonged period (up to a month), the squirrel, mice, and rats will begin to disappear from wherethey live in; Please make sure the ultrasonic mouse repellent be plugged continuously to keep them away