User's Manual

When using a Bluetooth USB adapter or SD card
If the Bluetooth USB adapter or SD card has not been properly inserted into the device,
poor contact or other problems between the two may prevent devices from properly
communicating. Please ensure that the card has been securely inserted into the slot.
Note
• Battery-operated devices may not be able to communicate properly if the battery
level is low.
Please either recharge or replace the battery if the level appears as below: