Repel mice, rats and cockroaches from your home or office quickly, effectively and safely. The repeller emits high frequency ultrasonic waves that will attack the pest’s nervous system making it unbearable for them to stay. Totally safe around children, adults and pets, it covers over 4000 square feet, so you can avoid nasty traps, baits and dangerous poisons. Powered 9V, adaptor supplied. 11.5cm W x 9cm D x 8.5cm H.