I haven't been able to confirm the operation because I don't have an environment to test it. The later model with the "ff" mark appears to be a version with an improved picture quality due to the addition of a noise filter compared to the later model without the "ff" mark. The picture and sound quality are better than the earlier model, and among the later models, the one with the "ff" mark is a version with even better picture quality. This is a very old item, so please consider purchasing it with the assumption that it may need repair. Thank you for your understanding.