Audiovox D1817PKG Instruction Manual page 23

6. A-B REPEAT
a. During playback press 'A-B' once to set the Starting Point A.
A-B Repeat Starting Point Screen Display
b. Press 'A-B' a second time to set the Ending Point B and the player
will repeatedly play the part between Point A and Point B.
A-B Repeat Ending Point Screen Display
c. Press A-B a third time to cancel A-B repeat and resume normal
playback.
A-B Repeat Off Screen Display
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