Make sure the AMIRON 200 is switched on and sufficiently charged. Both earphones must be in pairing mode to establish a connection with your playback device.
Also ensure that no other Bluetooth connections are active. If necessary, clear the pairing list of all previously connected devices: by press the multifunction button on the case 1x short, and then press and hold the multifunction button for approximately 6 seconds. This will delete all existing Bluetooth connections and the AMIRON 200 will automatically enter pairing mode again.