Longer Playing Time:Charging for about 2-2.5 hours can provide more than 10 hours of playing time, Bluetooth headband brings you a good nightâ€s sleep.Multifunctional Bluetooth Head-mounted Sleep Headphones:three-in-one sleep headphones, so you can listen to music without wearing other headphones, and protect you from hair and sweat.Bluetooth 5.0:The thickness of speaker is only 0.25 inch, high-definition HiFi produces excellent sound quality, very comfortable for sleepers.Specifications:Bluetooth version: 5.0Bluetooth protocol: AGHSPBluetooth solution: LanxunBluetooth transmission distance: 10 metersHeadphone channel: stereo (2.0)Music playback time: maximum sound 7H, medium volume 10 hoursMicrophone distance: 1 meterBluetooth standby time: 72HBattery capacity: 150ma/hBattery power: 0.55WSpeaker impedance: 32 ohmsSpeaker power: 0.02WFrequency range: 2.4-2.4835GHzSensitivity: 45dbTransmit power: 6dBAudio output distortion: 0.6%Audio output signal-to-noise ratio: 93dBCharging time: 1-2 hoursMaximum input voltage: DC 5VMaximum input current: 150mahMaximum input power: 0.55WFunction: HD call function, mobile phone battery display, listening to musicProduct weight: 80gProduct size: 27cm*10cm/10.62inch*3.93inch(Approx.)Package included:1*Bluetooth headset1*cable1*user manual