This is a YOKOGAWA UR180 Chart Recorder. Model 4171-500-32/BU. This item has been used and has some wear and tear. The door had some stickers on it and there is still some glue residue on it. We plugged it in and it came to life but we did not test it with chart paper and an input signal. However, if you were to purchase it and it doesn’t perform to your satisfaction, we will take it back.