product description: Connect the HDMI-Compatible signal source to a single HDMI-Compatible display device (such as a TV, projector) and output stereo + SPDIF signals independently to achieve the audio signal synchronous separation of HDMI signals. Product applications: such as places with limited noise, transmission distance and safety, data center control, information distribution, conference room demonstrations, teaching environments and company training places Product features: One HDMI-Compatible signal input, converted into one HDMI-Compatible + Audio (SPDIF + 3.5 Audio) output Support audio output: SPDIF + 3.5 Audio Support: up to 4K * 2K @ 30HZ can realize audio synchronous separation output, there are PASS, 2.0CH, 5.1CH three audio modes can choose LED indicator, when the signal source or signal end is in working state, the corresponding indicator. Simple installation without signal loss Package Contents: Extracto1pcs USB Power Cable 1pcs 1pcsUser Manual