1. Use voice dialing: short press the MFB button (press no more than 1 second and hear 1 beep is short press), say the name you want to call, if you want to store it on your phone. Voice dialing records.
2. Dial the last call number: Press and hold the multi-function button to complete the redial.
3. Answer the call: Short press the MFB button once.
4. End the call: Short press the MFB button once.
Precautions for use: When the headphone is running out of power, there are 5 short beeps every 20 seconds.