Use an external BT transmitter such as the one in the link below:

Plug in the BT transmitter 3.5mm jack to the Remote audio output. 

Next, pair both the Strap and your headphones to the BT dual transmitter.

*Important Notes:

1. As some controllers have weak audio amplification, in order to get higher audio and sensation levels you may choose to connect the Strap directly to the TV screen. 

2. Remember to always set your audio source to HIGH volume.