The Roland RE-101 is a tape delay that was used for creating echo effects for audio use.

It was released alongside the Roland RE-201 as part of the second ‘RE’ range. It replaced the earlier Roland RE-100 model and included improvements to build and quality. It was the basic model of the second range and did not include a spring reverb like the Roland RE-201. Features included a new free running system that minimized noise, wow and flutter when the internal tape loop was running, this increased the tape life by 6-15 times (up to 300 hours of use). Other new improvements included lower noise levels that improved the sound quality.

[From Wikipedia]