Blackbird 4K 4x1 HDMI Switch with Digital Coaxial and Digital Optical Audio Outputs This is a high performance HDMI switch with four inputs, one output, and separate digital and analog audio outputs. It supports HDCP repeater functions and fast switching between any of the four HDMI inputs. The system supports all 3D TV formats in addition to all HDTV formats up to 4K. Furthermore, the remote control gives you complete control over the selection of sources and makes the device incredibly easy to use.