The easy to use Rentokil Battery Operated Mouse Repeller is a fully portable ultrasonic rodent repeller for use around the home and elsewhere. Taking only one battery, the long lasting unit emits a sound that encourages mice and rats to move on elsewhere. The sound cannot be heard by humans, or by cats, dogs and other non-rodent pets making it a great way to help keep your property pest free. Use this repeller in any room, it is also ideal for lofts, sheds, caravans, out houses, etc - anywhere where there may be no plug for the usual plug in units. The Battery Operated Mouse Repeller helps protect up to 90 square metres of space, and more can be used to protect larger areas. This product is made in the UK.