... amplify two systems at the same time, for example GSM+DCS, GSM+WCDMA, CDMA+PCS, etc. Though it is dual band ... relevant systems of GSM850, GSM900, DCS, PCS; CDMA450,CDMA800, CDMA1900, CDMA2000, WCDMA2100 and AWS5.The repeater gets quite comprehensive functions:1) Intermediate ... 3dBi gain, or indoor wide band panel antenna 7dBi gain. Cell Signal Booster / Repeater / Amplifier