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

Cassette Information
Record Speed/Playback Time
Use only those tapes having the *"[)" logo indicating the 6.35mm digital standard.
Cassette type | Record Speed/Playback time
Erase Protection
Cassettes have a sliding record tab to ensure recordings are not accidentally erased.
1 To prevent accidental erasure
Slide the tab to the left (open).
2 To record again
Slide the tab to the right (close).
14 For assistance, call 1-800-211-PANA(7262)