It depends on what recording quality is set.
- Highest quality, uncompressed, format: WAV, 1,411 kbit/s
- Very high quality, format: MP3, 192 kbit/s
- High quality, format: MP3, 96 kbit/s
- Above average recording time, format: MP3, 64 kbit/s
- Longest recording time, format: MP3, 8 kbit/s
This gives the following recording times:
2280 hrs (LP), 284 hrs (SP), 190 hrs (HQ), 90 hrs (SHQ), 12 hrs (PCM).
MP3 8 kbit/s > 2280h / 24h = 95 days
MP3 64 kbit/s > 284h / 24h = 11.8 days
MP3 192 kbit/s > 90hrs / 24hrs = 3.75 days I set this for sessions with 4-8 people at the table.
https://www.dictation.philips.com/ch...

The Philips product data sheet states: "Thanks to the 8 GB internal memory, you can record for up to 88 days". I see no reason to doubt this statement.