1Mii B03 Pro - As a Wireless Receiver (RX mode)

Note: If B03 Pro fail to pair, hold button for 2s to enter pairing mode.
Pair with the second device
Set second headphones/speaker to pairing mode.
Set B03 Pro to pairing mode again, hold the button for 2s until the TX LED flashes Blue and Red.
Wait until connected.
As a Wireless Receiver (RX mode)