The Boss RPD-10 half-rack delay unit was made in Japan, starting in the mid 80's. This unit can do up to two seconds of delay that alternate repeats from left to right, with controls for time, feedback, tone, and effect level. On the rear it takes 1/4" guitar or RCA cables with stereo outputs (use only one channel for mono). A switch chooses -20dBm (guitar level) or -10 dBm (semi-pro gear, effects loops, synths, etc.) You can cancel the direct signal outputting only delay, so it can be used with a mixer or in an effect loop with a blend control.
If you choose the chorus mode the controls will allow you to shape things to your liking, and for example if you crank the tone knob, it can add high end to the chorus effect, simulating a Boss/Roland Dimension C. The rear panel also has a jack for the bypass switch and hold function. This effect unit is in excellent good used condition with some minor cosmetic wear, but functions as it should. It is powered by a standard 9 volt power supply.