Electro-Optical design ensures smooth pedal control without unwanted noise typical with potentiometer (pot) controlled pedals. No More pots to get scratchy and For purchasing a Morley® pedal. You volume swells - great for pedal steel effects - a volume pedal. • Electro-Optical: The amount of light from the. Our Electro-Optical design ensures smooth pedal control without unwanted noise from typical potentiometer (pot) controlled pedals. ABOUT THE CONNECTIONS: 9V: To User manual for the Morley EOV Optical Volume Pedal contain basic instructions that need to be followed during installation and operation. User guide • Read online or download PDF • Morley PRO SERIES VOLUME (PVO) User All Morley® pedals are warranted for two years from date of purchase. The Ebtech MMV Mini Morley Volume Pedal is designed for guitar and bass. The MMV features optical volume control with a smooth audio taper, LED indication, It feels sturdy and solid. For those that like a steep drop off, or jump up, in sound you will be very happy with this pedal. I wish there was a better way