... 2) Low interference to BTS 30dbm GSM wide band repeater / signal booster for cell phones:1) Output 30dbm, gain 85db, works on ... of a home, office, restarrant, VIP rooms, parking lots, buildings.3) Built in AGC and ALC circuits, which can automatically control ... repeater, extended phone battery life.6)LED light working and signal condition indicators.7) Available models: C30C-GSM, C30C-CDMA, C30C ...