You can use the AC power or batteries
as a power source.
14 Battery compartment
1 Inserting the back-up batteries
Insert four R6 (size AA) batteries (not supplied) into
the battery compartment. These batteries work to save
the memory data.
Take out the batteries as illustrated.
2 Connecting the AC power cord
Insert one end of the supplied AC power cord to the
AC IN socket located at the rear of the player, and the
other end to the wall outlet.
2 to a wall outlet