4x extended USB ports, switchable two inputs, sharing USB devices for two hosts. Industrial grade metal case, rugged & durable, with mounting holes for easy installation ^^ Industrial grade HUB chip, adopting STT technology, allows stable and smooth 4x concurrent USB connections ^^ ESD protection for each USB port, preventing electric surge damage and data loss ^^ Over-voltage protection, effectively preventing other high voltage power input from damaging the connected devices ^^
Multiple protection circuits: over-voltage, over-current, short circuit, over-temperature, reverse current, under voltage lock-out, 8KV ESD protection, filtering protection, etc.