Grandstream Carrier Grade HD Dect Base Station Ptt Extended RangeDescriptionSpecificationsShipping The DP755 is a powerful DECT VoIP phone base station that pairs with up to 10 of Grandstreams DP series DECT handsets to offer mobility to business and residential users. It supports an outdoor range of up to 400 meters with the DP730 or up to 350 meters with DP722 DP720 as well as an indoor range of up to 50 meters to give users the freedom to move around their work or home. This DECT VoIP phone base station supports