PYLE Audio PLFMTR9BT - Manual (Page 8)

When adjusting the Circulation mode, the screen
displaying the recent circulation mode.
When change to another folder, the screen displaying
the recent folder number.
When inputting the FM channel by number key on the
remote control, the screen displaying.
When choose the song by the number key on the
remote control, the screen displaying.
When conducting voice dialing, the screen displaying.
(You must have voice dialing function on your phone.)
When playing the music from your phone through
Bluetooth, the screen displaying.