Discontinued in 2017. The BOSS DD-20 Digital Delay is renowned for being BOSS' most powerful delay pedal. It boasts an impressive delay time of up to 23 seconds and offers extensive user memory. The pedal includes 11 different modes, featuring new ‘Smooth’ and ‘Twist’ delays that allow for both subtle and radical delay effects. The push-button knob enables quick adjustments to the delay time and also supports tap tempo. Additionally, the Memory function facilitates seamless transitions between various delay modes, making it a highly versatile tool for guitarists. Despite its discontinuation, the DD-20 remains a desired product for its extensive features and top-notch sound quality.