USB 2.0 Hub, 4 port, Commerical Expands 1 USB port to 4 USB ports. ESD Level 4 (Contact 8 kV, Air 15 kV) Performance Criteria B. USB 2.0, 480 Mbps, high speed. Wide operating temperature (-40 to +80 °C). Rugged panel mount case. High retention USB connectors hold cables tight. USB cable required - sold separately.