After setting, short press the button to select “Exit”，then long press the button to exit the system menu and return to main menu . 5.3 5 Bluetooth setting Under main menu, short press the button to select “Bluetooth”，then long press the button to enter its selection interface as shown in Figure 10 and Figure 11. When the Bluetooth is “ON’，if there is no data to be transmitted, the Bluelooih will turn off automatically after a few seconds.
