The CAM-3 miniature 3-channel microphone mixer allows you to add and mix
sound from 3 microphone sources simultaneously. The mixer features 2
mono 3.5mm input jacks and 1 stereo 3.5mm input jack. The output is also
a stereo 3.5mm jack. The electronics of the CAM-3 are passive which
means it operates without batteries or a power source.