Double speed Tremolo pedal handmade by the late great Cesar Diaz in Texas. Precision controls on the Diaz Tremodillo Tremolo include rate (speed of tremolo), dwell (depth of tremolo), and a speed stomp switch which doubles or halves the tremolo rate. On/off stomp switch and indicator light that flashes with the tremolo pulse. Power jack for external power source or use internal 9V battery.