The inputs are normalized so you can use the module either in stereo or in (dual) mono. If a cable is inserted the the "L" input only then the signal will be output at both outputs. If both inputs are connected then the signals are being sent to the correspondent outputs. The output level of both channels is set simultaneously with a common potentiometer.
inputs L and R: 3.5mm (1/8") minijack mono
outputs L and R: 6.35mm (1/8") jack, line level
headphone output: 6.35mm (1/8") jack stereo
3U Eurorack module, 6HP wide, 44mm deep
power consumption: 30mA