Power on, the digital display displays H1, output startup voice, and the startup volume is 30% by default; The volume adjustment display is divided into 15 sections.
P/P button, play and pause button; Press and hold 35 to turn on and off.
PRE/V-button, Bluetooth, TF card, USB mode: short press the previous track, long press volume reduction; FM mode: Short press to search up channel, long press to reduce volume.
NEXT/V+ button, Bluetooth, TF card, USB mode: short press a song, long press the volume to add; FM mode: Press down to search, and press and hold to add volume
MODE button, short press the key mode to convert between U disk, TF card, Bluetooth, FM-AUX
When there is only U disk: Switch the sequence U disk - Bluetooth - FM-AUX
When there is only TF card: Switch the order TF card - Bluetooth FM-AUX