Inaudible to humans but intolerable to pests, this compact ultrasonic pest repeller emits a high pitched sound frequency that's repellent to mice and rats, and insects such as mosquitoes.Covering 100m2 for rodents and 50m2 for insects, this small battery powered unit is totally humane - it uses no poison or insecticide, does not kill or trap, and it's safe to use in any indoor location. Won't harm children or pets. Safe, environmentally friendly, effective and convenient deterrent that keeps unwanted rodents, ants, bugs, fleas, roaches, spiders and other pests away.Enjoy a life free of mice, rats, cockroaches, ants, silverfish and other insects without traps, poisons or the expense of professional exterminators. Neat cordless unit protects a room, garage, attic or even shed and delivers a powerful ultrasonic frequency inaudible to humans and safe for use near cats and dogs. Battery operated. Requires 1 x 9V battery, not included. Indoor use only. Measures H2.5cm, W8cm, D8cm.