Stv have produced a wide range of pest control sytems and weatherproof baits for a wide range of unwanted guests in and around your home or work place this stv728 sonic mouse and rat repeller provides complete home protection from unwanted rodents easy to install it just plugs in to a standard 3 pin socket and the device is ready and working to protect your home the stv728 unit has a continuous output of over 100d b at swept frequencies that are too high for people cats and dogs to hear stv unit