Akai ACVDS715UX Operation Manual page 7

Insert one Lithium battery (Cr2025) making sure the polarity (+/-)
matches the marks inside the unit.
Corrosion, oxidation, battery-leakage and any other gradually
acidic defect of this nature will invalidate the guarantee.
PLAY/ PLAY/
PAUSE
(Fig 1)
(Fig 2)
(Fig 3)
USB
GB-7
USB Button
Play/Pause Button
Fig 1
Fig 2
Fig 3