Coby CSTW52FD User Manual page 7

Playing from external device
USB / TF card
Under any mode, insert a TF card or USB disk into the TF card
slot or USB port of your speaker, it will immediately play the
music files in the TF card or USB disk.
The music playback controls are the same as the Bluetooth mode.
The speaker will take the newly connected USB disk or TF
card as the first priority for the music playback. If the USB
disk and TF card are connected to the speaker at the same
time, you can repeatedly press the Mode button to toggle
these playback modes, and the playback mode will change
as follows:
FM Radio Mode
RGB Light Mode
There are 6 light modes available, under any playback mode,
repeatedly press the RGB Light button
the 6 light modes. Press and hold the RGB Light button
to turn off the RGB light. In light off mode, press the RGB Light
button once to turn on the light again.
TF card Mode
EN 06
Bluetooth Mode
USB Mode
to toggle between