KE22 Bluetooth Headphones 1. Upgrade Version5.1 Bluetooth ,no ,efficient and smooth continuous conneciotn 2. Rotatable folding microphone,practiocal but not cumbersome 3. It can make the brain away from the phone radiation, no longer need to hold the phone to call, the waist is not sore, and also reduce the phone The risk of falling 4. Suitable for running, bicycling, sports. 5. Support both wiress and wired modes. Used as a wired headphone with an audio cable plugged into your earphone jack. Change from wiress headphones to wired headphones in seconds 6. 40MM large moving coil unit,the sound is close at hand 7. BT Version: BT5.1+EDR 8. Battery capacity: 360mA 9. Standby time: 180hours 10. Sensitivity: 108dB 11. Frequency response: 20 Hz-20 KHz 12. Charging time: 1-2 Hours 13. Working time: 3-4hours 14. Bluetooth distance: 10M 15. Package included:- 1 x Blue tooth headset- 1 x Charging cable- 1 x Audio cable- 1 x Manual