The SYNCHRONATOR HD uses the same concept as the original SYNCHRONATOR AV device. It has 3 audio inputs and one video out and adds video sync pulses to your audio, effectively disguising the input as a video signal.
For a good connection to beamer or flat screen tv, the output signal is HDMI with a resolution of 720p and a refresh rate of 60 Hz.
The HDMI signal includes a stereo mix of the audio pass-through.
The device requires 5V DC for operation and is shipped with a USB to mini USB cable for it to be connected to a phone charger or comparable adapter.
SYNCHRONATOR HD device (720p60)
mini USB adapter cable
More info at synchronator.com