Features: Color: random Bluetooth version: V4.1+EDR Type: Wireless bluetooth, hands-free SNR: 98dB Sensitivity: 92dB Audio codec: 24 bit Distance: 10meter, class2 Electric current: lDC5V\/100MA-1A Play time: last up to 2 hours Instructions: 1. Power: Press the power button for 2-3 seconds, along with red and blue lights, boot into the back even state 2. Power Pairing: Press the power button for 5-6 seconds, along with red and blue lights, after flashing red and blue alternately into pairing mode 3. VOL +: Press the volume + button for 2 seconds, add up the volume a maximum sound, a warning sound 4. VOL-: Press Volume - button for 2 seconds, cut down the volume a minimum sound, a warning sound 5. Previous: Press VOL+ 6. Next: Press VOL- 7. Telephone Answering: when to call, press the power button 8. Refused to answer: when to call, press the power button for 2 seconds 9. Redial last telephone number: double-click on the standby power button 10. Charging: red light when charging, fully blue lights Problem Solution: 1: Some Android phone or PDA flashed the unmatched ROM OS.(Suggestion: Restore your phone with original ROM OS.) 2:Press the Power button with wrong time.When first time link the earphone to source(phone\/pda\/mid\/pc\/laptop) The correct operation is :Keep pressing the power button with 5 seconds then the blue light turn on.(Now do not loosen the power button ) Wait about one second .When Alternately flashes blue and red light.PLS loosen the power button. Now the bluetooth earphone become can be found. Package Included: 1x Wireless Bluetooth Headset