The J4858D Aruba SFP (mini-GBIC) transceiver offers superior networking performance up to 1640 feet. It comes in a plug-in form factor meaning it is ready for use when plugged in immediately and provides a data transfer rate of 1Gb/s per sec. Part Number: J4858D Manufacturer: HPE Aruba Device Type: SFP (mini-GBIC) Transceiver Form Factor: Plug-in Module Connectivity: Wired Cabling Type: 1000Base-SX Data Link Protocol: GIGE Data Transfer Rate: 1 Gigabit/sec Max Transfer Distance: 1640 Feet