From JHS:

The JHS Pedals 3 Series is a collection of pedals designed to give you affordability and simplicity without compromising quality. Each 3 Series pedal is made by us in Kansas City, MO, using high-quality parts, quality control, and attention to every detail. Each pedal has three simple controls and one toggle that offer a wide range of sounds, perfect for beginners and professionals alike. The JHS Pedals 3 Series will inspire your playing and help you explore new sounds at a totally approachable price point.

Tape delay was invented in the late 40s when Les Paul strung two Ampex Model 200A reel-to-reel tape recorders together. A little later, in 1953, Ray Butts invented the Echosonic, the first actual tape delay unit. This would be followed up by the Echoplex EP-1 in 1961 from Mike Battle and the Space Echo from Roland in 1974. The JHS Pedals 3 Series Tape Delay is a simplified and faithful throwback to these classic units. The Mix control lets you control how much clean signal is blended in with the wet (delayed) signal (on the original unit, this was called Echo Volume). Tape Speed acts as a simulation of the RE-201’s tape motor speeding up and slowing down and determines how short or long the delay effect is. The Repeats control goes from a single repeat to many, reminiscent of a sound being written onto the tape loop with loss of fidelity each time. Finally, when the Flutter toggle is turned on (up position), it replicates the wear & tear to the mechanical parts of a tape machine that happens over time. This causes mild modulation, warble, and flutter sounds in the echo path of the delay that so many players desire. 

CONTROLS

MIX - Controls how much clean signal is blended in with the wet (delayed) signal. Left is more dry signal. Right is more wet signal. 

TAPE SPEED - Controls the length of delay effect. Left is shorter. Right is longer. 

REPEATS - Controls how many repeats occur after you play. Left is less. Right is more. 

FLUTTER - Switch down is standard effect. Switch up introduces a mild modulation reminiscent of vintage units with mechanical wear. 

POWER - Requires 9VDC negative center power and consumes 65mA. Not not use more than 9VDC. You will void your warranty.