The Disaster Area - Smart Clock is a great solution for anyone needing precise tempo control for multiple devices. Big, blue LED display shows the beats-per-minute being used to sync between devices. Two isolated outputs are compatible with normally open or normally closed (Boss) devices. Tempo outputs may be used as non-tap expression of function switches, and tap tempo mode has selectable tap subdivisions for each output. The Smart Clock sends the signal and clock out to devices from 30-240 cpm with an accuracy of 0.07%. This controller can also receive external MIDI clock from a computer or other device. Disaster Area have thought of everything you might need in working out all the tempo kinks of your rig.