LevelOne GEU-1621. Maximum data transfer rate: 1 Gbit/s, Supported data transfer rates: 10/100/1000 Mbps. MAC address table: 8000 entries, Networking standards: IEEE 802.3, IEEE 802.3ab, IEEE 802.3az, IEEE 802.3u, IEEE 802.3x. Certification: FCC, CE+LVD, VCCI A. Operating relative humidity range: 10 - 90 %, Operating temperature range (T-T): 0 - 40 °C, Operating temperature range (T-T): 32 - 104 °F. Drive device, buffer size: 0.256 MB