Switchm mode: when play music( USB card/ TF card/ LINE IN? BT), press short to switch USB/TF/FM?BT. (switch
to “line in ” if via AUX cable to audio device.)
when play music, press short for last song, press long to turn down the volume.
when play music, press short for next song, press long to turn up the volume.
when play music (USB card/TF card/LINE IN/BT), press short for “play/pause”. under BT mode with mobile paired, press short to answer a call, press again to hand up. in FM mode, press short to search station automatically, press again to,stop searching).