Allows you to convert your HDMI cable into a DVI-D port the 15cm cable is easier to use behind faceplates or in trunking as an adapter will not always allow enough space. Bi-Directional so can used both ways from hdmi to DVI-D or DVI-D to a HDMI display. PLEASE NOTE: Must be a DVI-D (without the 4 analogue pins) in order to work Gold connections Digital Connection 26AWG Pure Copper 15cm long