Designed for consumers, in single story urban dwellings, the zBoost METRO dual band boosts indoor signal for all phones and mobile devices (except Nextel/iDEN or 4G, 2100MHz phones) and all US carriers using 800 and 1900 MHZ. The zBoost METRO for the Home or Office extends an indoor Cell Zone™ up to 1500 sq ft. and doesn’t require an outside antenna placement.