The DM671 is very unique, as it's the only recorder that finalizes as it records. You see, most recorders will lose your entire recording if there is a power outage (batteries die) or if theres a memory card error. The DM671 does not, everything is saved up to the point where the recording stops.
Learning from the shortcomings of the PMD671, the DM671 was engineered to be much more user friendly than its predecessor. Court Reporters years after year requested that one feature be added to the Marantz PMD671 to make their lives easier. A rewind for readbacks.
The DM671 allows for easy rewinding and playback for whenever a quick readback is needed. Simply hit the stop button and hold down the rewind for a few seconds then hit play. You will instanly be able to hear what was just spoken. No more setting index marks, or fast forwarding from the beginning, like the PMD671 did.
More importantly, it saves you money. Verbatim reporters were purchasing an additional backup recorder just so they could do a readback quickly. Now that the DM-671 can do it, theres no need to purchase a poor quality handheld recorder to do this.
Also, check out this new feature. Plug in a normal full size keyboard to the DM671 and control the recorder, playback or even rename your files.