Amazon.com Review
For use in homes and offices, these electronic devices plug into wall sockets and emit a high-frequency, ultrasonic sound (30 to 60 kHz) that repels rodents but is inaudible to humans and nonrodent pets. The devices are humane and nontoxic but effectively chase away rodents and prevent damage and rodent-borne diseases. Under ideal conditions (few sound-absorbing materials), each repeller delivers sound to 400 square feet of space. Red LED lights in front show that the units are working. The devices measure 3-1/8 inches square, function for five to seven years or more, and carry a 90-day, full-refund satisfaction guarantee and a three-year warranty against defects.
--Fred Brack
Product Description
PestChaser emits high frequency sound (ultrasound) in a range that repels rodents from an enclosed area. The sound is loud and very annoying to the rodents, but inaudible to people and non-rodent pets. This humane, non-toxic approach to rodent control is extremely effective and affordable. The set of 3 direct plug in units are excellent for rooms where the outlet is not blocked by furniture or drapes. Please keep in mind that each PestChaser only works in the room it is in, as ultrasound won't travel through walls or other solid objects.