Features: Any input HD Source can do audio extract by the SPDIF ort LR audio output port. Support full HD 1080P, full 3D, 4Kx2K. Suitable for mobile phone,laptop,display screen,DVD,etc. One MHL/HDMI double input and two HDMI input switch freely to one HDMI output. Support ARC Function: Without adding one extra HDMI Cable, it can reverse the audio to the AV Amplifier by HDMI Cable connection with HD TV while the HD TV receives the audio and video content. MHL/ HDMIworking in dual mode, can reduce the number of ports Specification: DC5V: 5V DC-DC Power Interface MHL/ HDMI IN1:MHL/HDMIDual Modeinput ports HDMI IN2-HDMI IN3:HDMI input interface OUTPUT:HDMI output interface SPDIF:SPDIF optical output interface L/R:LR audio output channel Operating and Connecting: 1.To use the HDMI cable to connect the input port of 3Port HDMI Audio Extractor with the HDMI sources or to use one MHL-HDMI cable to connect the MHL smart device to connect with the HDMI double mode input port. 2.To use one HDMI cable to connect the HDMI output port of the Switcher with the HD Display. 3.To use one optical cable to connect the SPDIF port of the Switcher with the AV receiver. 4.To use RCA audio cable to connect the LR audio port of Switcher with the Analog Audio Input port. 5.To use the IR remote or the switch button to do control and switch to the Input sources and the ARC/SPDIF function. 6.To connect the 5V adaptor with the device. Package List: 1x 5V Power Adaptor 1x Manual 1x Remote control 1x MHL-HDMI Cable