StarTech.com HP J4859C Compatible SFP Module - 1000BASE-LX Fiber Optical SFP Transceiver - Lifetime Warranty - 1 Gbps - Maximum Transfer Distance: 10 km (6.2 mi)The J4859CST is an HP J4859C compatible fiber transceiver module that has been designed, programmed and tested to work with HP brand switches and routers. It delivers dependable 1 GbE connectivity over fiber cable, for 1000BASE LX compliant networks, with a maximum distance of up to 10 km (6. 2 mi). Technical Specifications: Wavelength: 1310 nm Maximum Data Transfer Rate: 1. 25 Gbps Type: Single Mode Multi Mode Fiber Connection Type: LC Connector