Features 1. Bone conduction technology (Not In-Ear type) 2. Do not hurt your ears! 3. Healthier: Prevent bacteria inside your ears 4. Safer driving: Do not block sound when making phone calls / listening to music 5. Comfortable wearing 6. Size adjustable: Suitable for different head sizes Basic Operation 1. Operation: Headphone control, Prompt tone 2. Answer call: Click the call button, buzzing once 3. Ending call: Click the call button, buzzing once 4. Reject call: Long press call button for 1s, buzzing once 5. Re-dial last call: Double click call button, buzzing twice 6. Voice control: long press call button, buzzing once 7. Volume control: click the vol button " ""-", have buzzing at the volume limit 8. Play/Pause phone music: Press Play button, no 9. Power on, put switch on "on", prompt tone "Power on" 10. Power off, put switch on "off", prompt tone "Power off" 11. BT disconnecting, prompt tone "Dingdong" 12. BT connected, prompt tone "paired" 13. Matched again/manual matching: Long press play button for 3s, prompt tone "Ready to pair" Low Power, buzzing once Up/down Long press " ""-"for 2s , No Matching Methods 1. Put Bluetooth headphone switch at "ON" 2. Search Bluetooth device on your phone or other digital products, then choose it. 3. If it is 1st time to match, it will automatically enter the match mode once the BT headphone turning on. And the LED lights will alternate flash between blue and red. If it was connected with last device, it will automatically match in 10s. And the blue light is on. 4. If it matches other device or re-match, press "play" button for 3s, the Bluetooth headphone will enter manually matching mode. blue and red light flash alternately. Notes: 1. If the connecting distance is beyond the BT headphone effective range(10m or 33 feets), the headphone will disconnect with the device. Once in effective range again, they will connect again automatically. But if the disconnecting continues for long time(over 3 mins), you maybe need to double click "Play" button to connect again. 2. If turn off the device, Bluetooth headphone will disconnect. When turn on the device, only need to double click"Play"button to connect.