Coolgear Industrial 12-Port USB 3.0 Powered Hub for PC-MAC DIN-RAIL Mount All metal chassis provides a rugged and durable construction Buffers USB data from any attached peripheral in compliance with USB specifications. Designed to provide quick and easy access, can be powered with a three wire terminal block connector (9-48V) with AC Adapter Required, the AC adapter is sold separately Supports low speed (1.5Mbps and 12Mbps), Hi-Speed (480Mbps), and Super-Speed (5,000 Mbps) devices The all metal chassis provides a rugged and durable construction that can withstand operating conditions in both the Automotive and Marine industries.