Multiplex Jr.

Controls

Knob 1 - "Time": This knob adjusts the length between repeats with fully clockwise being the longest delay.
Knob 2 - "Feedback": Turning this knob clockwise increases the number of repeats in the delay.
Knob 3 - "Mix": This knob sets the dry/wet mix. Setting the knob at 50% sets the pedal for 50% dry signal and 50% delay.
Knob 4 - "Depth": With the modulation engaged, this knob sets the depth of the modulation, with the most modulation at fully clockwise.
Knob 5 - "Speed": With the modulation engaged, this knob sets how quickly the delay gets modulated.
Switch 1 - "Modulation On/Off": This switch turns the modulation on or off.
Footswitch 1 - "On/Off": This turns the pedal on and off

Without a schematic, we are not able to make a preliminary determination as to whether the Multiplex Jr. pedal outputs an inversely-phased input.

The 1776 Effects Build manual doesn't appear to contain the schematic though there is a page for it. This is likely an oversight.