Features: Industrial grade HUB chip, using MTT technology, can achieve stable and smooth 4xparallel USB connection 4 extended USB ports, capable of switching between two inputs, providing ESDprotections for each USB port by sharingUSB devices between two hosts, preventing surgedamage and data loss; Overvoltage protections, effectively preventing other highvoltage power inputs from damaging connected equipment Multiple protections circuits: overvoltage, overcurrent, short circuit, over temperature, reverse current, undervoltage lockout, 8KV ESDprotections, filtering protections, etc. Industrial grade metal casing, sturdy and durable, with mounting holes for easy installation Specifications: Material ：Metal Size：As Pictures Hardware Interfaces：USB Compatible devices USB-Flash Total USB ports：4 Material：Metal Package Includes: 1PC USB3.2 HUB note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!