The operation guide as followed:
1. How to connect to phone: long press MFB for 5s until the earphone enter pairing(red and blue flash alternately).
2.Reset: when charging， press MFB for 5s until red and blue light flash three times.
3. Redial last number: in standby mode， double press MFB.
4. Mute On/Off: During a call， double press MFB.
5. Answer a call: when there's an incoming call (indicator flashes blue)， press MFB once.
6. Reject a call: when there's an incoming call(indicator flashes blue)， press and hold MFB for 1 second.
7. Switch songs: Long press volume button to switch to next song/previous song when listen to music.
8. V-/V+: short press volume button when listen to music
9. Voice switching between headset and phone during a call， press and hold MFB for 1 second.

Features:
1. Built-in dual microphones， enjoy more clear sound than other earphones.
2. 210mAh battery， calling time is 12-20 hours. Long time to use.
3. Noise canceling function
4. Light weight， no pressure on ear.

Specifications:

Package  Included:

	1* QCY Q30 Business Bluetooth Earphone
	1* USB Charging Cable
	1* Ear Hook
	3* Earbuds
	1* Manual