Part 1. Power on and Connect
1. Plug the C51 adapter into the USB-C port or the Micro-USB port (via the USB C to A adapter included) on your device to power on.
2.Turn ON the headphones - Hold the button for 3s until you see the BLUE LED turn on. You will hear “Welcome to Avantree, connected”, and the LED indicator on both the C51 and the AS9M headphones will turn SOLID BLUE.
Note: This is a factory-paired SET, there’s No Need to pair them; just turn them on and they will auto-connect!
* If your USB C device is >
Nintendo Switch: You should be able to hear audio through the headphones now.
Mac, PS4 and Windows Laptop: You’ll need to set Avantree C51 as the default Sound Output/Playback and input/Microphone device.
Please contact us at support@avantree.com if you have trouble setting up.