Step 1. Get HM100P into pairing mode.
From power off, press and hold MFB button for 3 to 5 seconds until the LED flashes blue and red alternately.
Step 2. Activate Bluetooth on your phone. And search new device.
Step 3. Find "Avantree HM100" and click it to connect. Them will connect.
HM100P is ready for use now.