... S15A-DB,S20A-DB repeaters are dual band repeater that would amplify two systems at the same time, for example GSM+DCS ... ~2000 square meters.4.The band selective repeater design to support any two relevant systems of GSM850, GSM900, DCS, PCS; CDMA450, ... CDMA800, CDMA1900, CDMA2000, WCDMA2100 and AWS5.The repeater gets quite comprehensive ...