... can be adopted to expand more coverage;4,Adopting WDM (Wavelength Division Multiplexing) module to realize long-distance transmission;5,Stable and improval signal ... Power, Gain, Uplink ATT, Downlink ATT and etc.Remote Control Module(Optional)RS232+WirelessModem+ChargeableLi-ionBattery TETRA Fiber Optic Cellular Repeater ...