***** **********Best Quality Guranteed. *****Compatible for Netgear AGM731F, 2-Pack (TWO TRANSCEIVERS INCLUDED) ***** 1.25G Transceiver, 1000BASE-SX module*****850nm VCESL Laser Transmitter, 550-Meter@50/125m MMF*****Hot-Pluggable Footprint duplex LC connector Interface*****100% Each transceiver is individually done performance test and compatibility test in our test center before packing.