There are 3 modes, ’EMU KEB STD’,’EMU KBD for iOS’, and ‘BLE
PERIPHERAL’. You can press ‘Set’ button to select a new mode, then
press ‘Enter’ button to choose the mode ,the device will indicate you
‘Setting Bluetooth…’ and SHUT DOWN for setting the parameter. when
you restart the device ,there will be a mark’*’before the current setting
mode. If you want to return, you can choose the forth option ’RETURN’
by press the ‘Enter’ button.