... 4.MOQ:100 sets GSM Signal Repeater/Amplifier1. Function: Make amplification for signal and power when the indoor coverage signal weak.2. Fit scope ... : weak signal area, such as indoor, basement, tunnel, vehicles, yachts. 3. According to different network : GSM, DCS, PCS, CDMA ... =100%:RedPOWER Normal working: GreenUL/PNormal working: flash or Red GSM Signal Repeater/Amplifier