HP X121 1G SFP RJ45 T Transceiver. Data transfer rate (max): 1000 Mbit/s. Connectivity technology: Wired. Power consumption (typical): 1W. Weight: 30g. Cabling technology: 1000BASE-T, Dimensions (WxDxH): 13.7 x 14 x 68.8 mm, Compliance industry standards: IEEE 802.3ab