All switching hubs from Contemporary Professional controls offer these features:

Operate from 8–24 VAC or 10–36 VDC power CE Mark — 93/68/EEC
Auto-negotiate data rate, duplex and flow control UL 508 Listed
Run at 10 Mbps or 100 Mbps data rates CFR 47, Part 15 Compliant
Front-panel diagnostic LEDs C-UL Listed CSA C22.2 No. 14-M91
IP30 ingress protection 10–95%, non-condensing relative humidity