DG80-Gaming - How to Connect Two Headphones Simultaneously?

Pair the First Device 

Step 1: Get the DG80G into Bluetooth Pairing Mode.

Press & Hold the MFB button on C81 until the LED indicator starts flashing WHITE&BLUE rapidly.

Step 2: Get the headphones into Bluetooth Pairing Mode as well.

Avantree Headphones/Speakers/Receivers: The LED Indicator on the headphone/speaker/receiver flashing RED & BLUE.

Step 3: Keep your Device close to DG80G, and give them a few seconds.

It takes a few seconds to connect.
Once successfully connected, the flashing on the DG80G will turn Solid Blue (connected with aptX Adaptive / Low Latency) or flash blue slowly(connected with aptX HD, aptX, or SBC).

Pair the Second Device 

Step 4: Repeat steps 1 through 3 again.