MXR M169 Carbon Copy Analog Delay MXR's Carbon Copy Analog Delay. The knob markings glow in the dark. Operation has been confirmed. Please understand that this is a used item before purchasing. Product Description: The MXR M169 Carbon Copy Analog Delay, an essential analog delay for guitarists, will breathe new life into your playing. With a maximum delay time of 600ms and three simple control knobs, you can intuitively create your desired sound. The warmth of the analog sound allows for dreamy arpeggios and soaring lead playing. The MOD switch allows you to create even more expansive sounds, and it works perfectly with clean tones. The true bypass design preserves the pure sound of your guitar even when the effect is off. It's a must-have item that will maximize your expressiveness in any situation. Manufacturer: MXR Type: Electric Guitar