Apple TK720LL/A 4125Mbit/s 850nm network media converter

Finisar 4.125Gbps RoHS Compliant Short-Wavelength SFP Optical Transceiver This high-performance pluggable transceiver module (SFP) for LC Optical interface fits standard SFP ports in 2Gb and 4Gb Fibre Channel switches (backwards compatible with 2Gb devices) and Apple Fibre Channel PCI Cards--converting the port to an LC optical connection. Requires LC to LC optical cable between Apple Fibre Channel PCI Cards and switch.