... cell-phones. FEATURES:High gain, easy installation and operation.Full-duplex, single-port design.Use ALC technology, adjust extent ... bad . Applications :The amplifier small, practical, mainly for small customers, family, hotel, hotels, basements, car parks, offices and other occasions. ... also! ) Any questions, pls fee free to contact us Full set Mobile 1000M2 Dualband GSM/3G UMTS980(900/2100MHz) GSM ...