4 port USB (Universal Serial Bus) hub with built in 12m active extension cable can be used to extend the cable length of up to 4 USB (Universal Serial Bus) 2.0 devices. The extension acts as a transparent hub & buffers all upstream & downstream traffic. Specification: USB (Universal Serial Bus) 2.0 active extension with 4 Port USB (Universal Serial Bus) Hub Type A Male to 4 x Type A Female Cable length 12 meters Gold Flashed contacts Supports Windows 8 7 XP & Mac OS