... signal booster 2.CE,FCC 3.ETSI standard gsm repeater F15 dual band is wide dual band consumer repeater to support any mobile system ... to 1500square meters with proper engineering. F15 dual band supports the two systems of GSM+DCS, GSM+WCDMA, CDMA+PCS, CDMA+AWS, etc. ... other handheld devices throughout a building can benefit from a wireless repeater.7. Supports up to (50) users / calls simultaneously. ...