T3-R Triple High Impact Mice, Rat, Rodent Repeller Powers Out Mice, Rats, Squirrels etc. with Repulsive Ultrasonic Sounds (sound above human hearing). Changes in ultrasonic sound repelling is key and that is why the T3R comes equipped with a Duel Triple Attack Design. Easy Application | Stands on its own | Comes with 6ft. plug-in cord. Over 15 years in the business | We stand by our product | Customer service that cares and when needed is willing to take the extra steps for you to succeed. Safe to use around cats, dogs, humans, children, and all house hold electronics. Repels by using specially designed dedicated sounds above the human hearing. No poison or Chemicals used to repel, 100% Safe and Green Earth Friendly.