ZyXEL SFP-SX 1000Base-SX SFP Transceiver. Data transfer rate (max): 1000 Mbit/s. Dimensions (WxDxH): 56 x 13.4 x 12.46 mm. Operating temperature range (T-T): 0 - 70 °C, Storage temperature range (T-T): -40 - 85 °C, Operating relative humidity range: 5 - 95 %. Certification: Class 1 Laser 21 CFR 1040.10 & 1040.11 CSA TUV. Compliance industry standards: 802.3z, SFP MSA, Connector(s): LC, Power requirements: 3.15 - 3.45 V