Diaotec Squirrel Repellent Ultrasonic Rodents Repeller Mouse Deterrent Pest Control 3 in 1 Pressure Wave for Indoor Use

What is ultrasonic repellent and how does it work? Ultrasonic is any sound wave above 20,000 hertz (20 kilohertz aka 20 kHz), which is above the ability of the human ear to detect it. Squirrels can hear them but people can't. Most rodents, including squirrels, rats,mice can hear ultrasonic sounds.Studies at the University of Toledo found that squirrels can 49 kHz. Ultrasonic repellents work by emitting variable pitches of ultrasonic sound in a beat and tempo designed to irritate, frighten, and repel squirrels (and other rodents) from a given area. Results for ultrasonic repellents are mixed at best. A great deal of anecdotal evidence suggests they do work. Diaotec indoor ultrasonic repelling device comes with an AC adapter and instructions booklet. It is Indoor type squirrel repellent which equipped with two speakers and a transducer. Works on four frequency levels,the ultrasonic frequencies are 25 kHz to 60 kHz. Four built-in functions: ULTRA = ultrasonic sound, repel mice, roaches, fleas, crickets, ants etc effectively. TRANS = pressure waves, repel squirrels effectively. DUO = pressure waves + ultrasonic sound. TEST = test tone, simulates the sounds that pest hear, check the ultrasonic sound is work or not. The effective range is 5,000 to 6,000 square feet unobstructed. Walls, furniture, doors, carpets, drapes, and other normal indoor furnishings would shrink that area considerably, we suggest to purchase one for each room of your house. WARM TIPS In order to maximize it's effect, please make sure there are no any foods that those pests and rodents like around the place you put this repeller. Otherwise, they will try their best to come, even if they have to bear the bother of pressure and ultrasonic waves. After all, the foods is best attraction.