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How to use this 3.5mm HDMI Audio Micro USB Adapter: 1:Connect the HDMI input port to your input device, such as decoder, computer/laptop etc. 2:Connect an HDMI or VGA or dvi cable to your output device, such as projectors, monitors, TVs. Please note that you can only select one of three ports to connect to your external display devices. 3:If your HDMI output devices are monitors or projectors that are not compatible with built-in audio output or speakers, connect our adapters 3.5mm audio cable to the external speakers to get the audio output. When you connect the VGA or dvi output device, you also connect a 3.5 mm audio output. 4:If your input devices do not have enough power, please connect the micro USB cable of our adapter to your USB devices for power supply. Compatible Devices The HDMI audio micro USB adapter to HDMI vga dvi 3.5mm is compatible with decoders, computers/laptops and most HDMI input devices, and also supports monitors/projectors/TVs such as output devices equipped with HDMI Vga or Dvi port. IMPORTANT NOTES WHEN USING 1: The adapter can only connect one monitor at a time, it cannot connect more than one monitor to the output signal. 2:The HDMI port and DJ port support the output signal of 4k2k, but if you want to output 4k2k video, make sure you have a 4k cable, 4k source, 4k monitors. 3: When you buy the adapter from us, we do not supply HDMI, Vga or Dvi cables. 4:All VGA and DJ cables connected to your output device do not transmit audio, use a 3.5mm audio port on our adapters to get audio work. Package Contents: - 1 x 4 in 1 HDMI to HDMI / dvi / VGA adapter cable with audio output converter - 1 x audio cable - 1 x micro USB power cable