... supply, 2 return transmission modules, 4 forward. CSP8500 Optical Working StationSummary4 output, 45/87-862MHz, 2 optical receiving module, 2 retrun ... FC/APC or SC/APC connector,rated output level104dBuV(input optical power -2dBm), outdoor waterproof housing,AC135~250V(power cord ... plug(3 pole) or 35~90VFeatures•High quality PHILIPS optical receiving module.•Status monitor display.•Wide range of input ...