12. How to connect the RETRO NANO to two Bluetooth devices simultaneously in BT mode?

After a successful pairing with device 1, hold the play/pause button for about 5s to enter the pairing mode again. Search for “RETRO NANO” on device 2 and pair it with the RETRO NANO. Back to device 1, select “RETRO NANO” in the Bluetooth device list and reconnect them. Or, restart the RETRO NANO after a successful pairing with device 2, so the RETRO NANO can connect to two Bluetooth devices simultaneously.
RETRO NANO is a Bluetooth receiving device and has no transmitting function, so it cannot connect to wireless Bluetooth headphones.