Panasonic Digital Palmcorder PalmSight PV-DV910 Operating Instructions Manual page 14

Use only those tapes having the _'i"[_"rlogo indicating the 6.35mm digital standard.
Cassette type Record Speed/Playback time
SP LP
AY-DVM30EA 30 minutes 45 minutes
AY-DVM60EA 60 minutes 90 minutes
AY-DVM80EA 80 minutes 120 minutes
Cassettes have a sliding record tab to ensure recordings are not accidentally erased.
To prevent accidental erasure
Slide the tab to the left (open).
To record again
Slide the tab to the right (close).
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For assistance, call 1-800-211-PANA(7262)