There are lots of reasons that your headphones may be struggling to connect with your audio device. Most commonly this is due to something interrupting the signal between the two.
The Audeara A-01s can only be connected to two Bluetooth devices at one time (e.g. your phone and BT01 transciever). It can be helpful to remove or turn the bluetooth on other devices off, particularly while attempting to pair your headphones.
If you are having issues with the Bluetooth connection, you should try forgetting the headphones from your device and clearing the pairing list. Then try completing a soft reset on the headphones and reconnecting.
Please get in touch with firstname.lastname@example.org with the details of your specific issue and we will get back and try and help you as quickly as we can.