Linksys EtherFast® 4124 24-Port 10/100 Ethernet Switch for Europe. Networking standards: IEEE 802.3u, IEEE 802.3x. Switching protocols: Ethernet, Data link protocols: Ethernet, Fast Ethernet. Operating relative humidity range: 20 - 95 %, Operating temperature range (T-T): 0 - 50 °C, Storage temperature range (T-T): -40 - 70 °C. LED indicators: collision status, Link activity, port duplex mode, power. Data transfer rate: 100 Mbit/s, Dimensions (WxDxH): 170 x 45 x 267 mm, Connectivity technology: Wired