The 1x9 transceiver supports 1250Mbps and 20km transmission distance with SMF. The transceiver consists of two sections: The transmitter section incorporates a laser. the receiver section consists of a PIN photodiode integrated with a trans-impedance preamplifier (). 1.Feature 1x9 package with FC connector 1310nm Tx/1550nm PIN Rx and 1550nm TX/1310nm PIN RX 20Kmtransmission with SMF +3.3V single power supply LVPECL compatible data input/output interface Low and excellent ESD protection laser safety standard IEC-60825 compliant Compatible with RoHS 2.Application Ethernet Colour: Black Material: Plastic Package Contents: 1 pair of fiber transceiver(Due to different product batches, the appearance , which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.