as usual BRAVO AMAZON 1day received before the scheduled date .petite alarm very effective and easy to insalled I insalled in my garage and receiver in the entrance hallway, between the two there is a closed door and 7.50 meters separates the nickel ca walk I put the receiver on battery power 5volts bicause consomation .voila I advise anyone who has a business and is not always in the store .or the basement of a house ca warns intruders when you are upstairs.
