The DT-DMOT-1550-20KM from DAYTAI is a Fiber Optic Transmitter with Bandwidth 47 to 862 MHz, RF Input Power 80 dBµV (Input RF power), Wavelength Range 1527.99 to 1561.42 nm, Output Optical Power 6 to 10 mW, Distance/Reach 20 km. More details for DT-DMOT-1550-20KM can be seen below.