Specifications:Ergonomic ear-hook makes your wear comfortably.Allows you listen to music and answer phone call.Intelligent compatibility, supports all Bluetooth-enabled devices.Item Name: bluetooth-compatible EarphonesMaterial: ABSQuantity: 1PcChannel: Mono ChannelUsage: Ear-hanging TypeSound Type: One-sided HandsfreeBluetooth Protocol: 4.1Transmission Range: 10mBattery Capacity: 75mAhFunctions: Power Display, Call Function, Music Support, NFC FunctionDriver: 15mmImpedance: 32Bluetooth Version: bluetooth-compatible V4.1 + EDRBluetooth Usage Band: 2.4 GHzPower Level: CLASS IIOutput Power: 30mWBluetooth Distance: Barrier-free 10 metersFrequency Response: 20-20000HzWorking Voltage Range: 3.0V-4.2VMitoid Sensitivity: -42dBFeatures: Noise Reduction, Bluetooth, Music Listening, Ear-hook, Bone Conduction TechnologySize: 7cm x 5cm x 1cm/2.76" x 1.97" x 0.39" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x bluetooth-compatible Earphone1 x Charge Cable1 x User Manual1 x Silicone Cover (Others Not Include)