Verykool T742 - Manual (Page 6)

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Micro SD card. If no card is inserted, the second disk cannot be opened. This unit
supports the extension of the Micro SD card from 128MB to 32GB.
Inserting and Pulling out the Micro SD card
Inserting:
Put the Micro SD card face up (side with words), and slightly force the card into
the socket of the card, i.e. connecting the unit. Under this state, you can play the
content in the Micro SD card.
Pulling:
Slightly push the Micro SD, and it will bounce by a section, and then you can
take it out.
Caution:
Please perform inserting and pulling operation when power is off! Otherwise, it
will lead to the loss or damage to the files within the unit! If no card is inserted, the
computer will be unable to perform read and write operation for the disk notes of the
later removable disk (Micro SD card).
Battery:
High capacity Polymer battery is used for this unit.
The duration available of the battery power depends on volume, types of playing
files and operation of batteries. The player can be set up by the user as "user define
power off time" or "display setup" to save batteries.
Charging:
This unit can be recharged by USB port; you can also use DC Charger:
Take out the DC charger, plug it into the wall outlet with AC 220V, then plug in
the DC jack into the device DC-in jack.
Warnings for charging:
1. A new battery may be empty and not charged before you get the device.
2. If the device is not used for long time, it is better to charge it to full capacity