How to Enter Bluetooth Pairing Mode
Make sure that the earbuds are off. From there, hold the power button until the LED indicator alternates between flashing RED & BLUE.
Note: If you are turning on the earbuds for the first time, or if the earbuds are not connected to a device, the earbuds will automatically go into pairing mode (the LED will flash RED & BLUE.)
In the Bluetooth settings, locate "Avantree NB17". If the headphones are in pairing mode, it should say "Ready to pair" underneath "Avantree NB17". Click "Pair" to connect the headphones.
After connecting the headphones, the LED on the headphones will occasionally flash BLUE. On your device, there may be a pop-up indicating that you are connected. Otherwise, you can check the Bluetooth settings and "Avantree NB17" should appear as connected.