Audio Mixer (3 to 1)

This is an audio mixer intended for droids where up to 3 audio signals need to be combined into a single output.

The amplifier with loudspeaker (or an active loudspeaker) is connected to the output and any audio sources can be fed to the 3 inputs.
Thus, for example, the MP3 trigger can output regular sounds, but at the same time you can play another signal simultaneously via a Bluetooth receiver.

Features:

• Needs 5V
• 3x stereo input via headphone jack or pins
• 1x stereo ouput via headphone jack or pins
• Six on board trimmer pots allow level adjusting for each channel (intended for infrequent level adjustments)

More Info: https://www.printed-droid.com/kb/audio-mixer-3-o-1/