To connect more than one pair of Bluetooth headphones to a single device, you are going to need to get a hold of a Bluetooth transmitter.
A few things to keep in mind when using a Bluetooth transmitter:
1. You need to be in the range of the transmitter for proper operation.
2. While they can connect two pairs of headphones, more can cause some audio degradation.
3. For proper operation, you need to stay still to keep the connection stable.
To access this feature, you will need to:
1. Connect your pair of Beats or Apple-branded Bluetooth devices.
2. Tap the Airplay icon.
3. Tap share audio.
4. Place the second pair of Beats or Airpods close to your iPhone.
5. When they appear on the screen, click share audio.