Buy from Amazon : br br KeyRinger Key Finder locate items up to 300 feet away loudest available - guaranteed! br br Loud extremely durable and operates up to 300 feet br Includes two KeyRingers - either KeyRinger calls the other br KeyRingers can also be called from your computer smart phone or tablet using an application available on the KeyRinger web br Great for families - if you order multiple sets of KeyRingers they can all be called simultaneously or individually br Full 90 day no-questions-asked money-back guarantee and full two year warranty