4K x 2K HDMI to HDMI + Optical Toslink SPDIF + RCA Coaxial + 3.5mm Stereo Audio Converter Adapter One HDMI in to HDMI / Optical TOSLINK SPDIF / 3.5mm stereo audio / RCA Coaxial output Input port: HDMI, Output port: HDMI+Audio+SPDIF+Coaxial Aluminium alloy housing, shield electromagnetic interference, heat fast HDMI is compliant with HDMI1.4, high bandwidth capability, support up to 4Kx2K@30Hz Compact size: L*W*H=88x68x26mm