Repels: Roaches, Rats, Mice,.... and other critters Covers up to 1000 sq feet (Recommended one per room) JUST PLUG IT IN Pest Contro produces ultrasonic sound above the hearing range of common domestic pets such as Dogs, Cats, Snakes and Birds. Not recommended for use in a room with Rodent Pets like Hamsters, MIce, Rabbits or Tarantula Pets. WILL NOT effect Electronic Appliances such as computers, T.Vs, etc FOR INDOOR USE ONLY Economical Single Room Protection Direct Plug-In "Sweep Sound" Technology Ultrasonic On/Off Switch LED Power Indicator Two year warranty