Disaster Area Designs micro.clock in excellent condition, tested and working. Includes the original box.

The micro.clock is a compact tap tempo and clock source for your pedalboard. Tap the footswitch to set the master tempo, and it sends taps to your other pedals so everything locks to your playing. Two tempo outputs can have different subdivisions (quarter, dotted-eighth, eighth, triplet), and a third MultiJack output works as an extra tap output, control-voltage output or MIDI output (this needs an adapter cable). It also sends MIDI program changes and clock from 30 to 240 BPM, and it has a display for the current tempo and presets.

It works with any pedal that has a remote tap tempo input, including many delays, tremolos and phasers. The internal DIP switches (visible on the underside) let you set each output's polarity, and there's a pull-up setting for compatible Strymon pedals. Check your pedals' tap input requirements before buying.