A:Answer Hello, Henry! The range can reach up to a 1000ft when there is a clear line of sight between parent unit and baby units. Any obstruction between parent and baby units will reduce the range significantly. With parent and baby units indoors, the typical range is up to 165 feet. If you have any further questions, please reach our support via live chat or email with this info, and we'll be happy to help. Our support contacts can be found on the box or in the user's guide. We will get back to you as soon as possible. Kind regards, Crystal & the Motorola Support Team.