Specification:? Blue/Red LED indicating.? Transmission distance: 10 Meter.? Bluetooth type : Bluetooth 3.0 +EDR.? Frequency Response: 20HZ---20KHZ? USB: micro USB.? Power: 200MAH lithium rechargeable battery.? Play time : 5-7 hours? headband material: polyester.? Suits for both Men&Women.? Package:1pc + USB charging cable+User manual Operation Guide:-Press the on/off button about 5S till the LED light blink from blue-red.-Open the bluetooth in your phone and match with the beanie-After match successfully open the music in your phone， then you can enjoy themusic with the hat， press the on/off button can pause it-Press the on/off button， you can answer the phone. press again for up it-Long press the Forward button for volume +，long press the Back button forvolume.-Press on/off button 2-3 seconds can back to dial the telephone-When charging the red light bright， charging is complete， the red light will off.