This is the Minifooger Delay from Moog. The MF Delay is a 100% analog pedal that uses bucket brigade technology combined with a vintage compander circuit that delivers up to 700ms of smooth, organic repeats. Moog has designed this delay to create a darker ambiance which is ideal for guitar or bass and can either take off into self-oscillation or hang out in that magical place where repeats are infinite and clean. There are also a number of unique features such as a pre-delay Drive circuit that boost both the input and output sections up to 22dB, so you can give your delay laden solo a boost or add extra grit to a classic slapback echo. As with all Minifooger pedals, the MF Delay can accept an expression pedal and be assigned to the delay range or Feedback level. This lets you sweep through the delay time for chorus or pitch shifting effect or give you the ability to swell into infinite repeats anytime you want.