... dual Power Supply 4.OEM Service FWT-1550ET series , 1550nm Top Type External Modulated Optical Transmitter, 47~(860)1000MHz, CNR≥53dB ... ,1+1 plug-in back-up power supply,which can work at 86~265voltage, MS switch automatically,casing temperature auto-control ... (two outputs, ≥11dBm) FWT-1550ET -2×12 (two outputs, ≥12dBm) Top type analog 1550 tv transmitter 1550nm Externally Modulated Optical Transmitter