Features 1 Open Ear Clip On Design Experience unmatched comfort and breathability with the open ear design which clips securely onto your ears 2 Flexible Joint Design Crafted with 0 5mm memory titanium wires and soft TPU providing an adaptable fit through 10 000 bends 3 Racetrack Dynamic Drivers 12mm x 17mm titanium coated racetrack dynamic drivers deliver clear impactful sound 4 3D Surround Sound Activate 3D Surround Sound through the soundcore app for an immersive audio experience 5 AI Enhanced Clear Calls Advanced AI algorithm and microphones ensure your calls are heard with precision and clarity 6 Long Lasting Playback Up to 21 hours of playback with the charging case and 7 hours on a single charge with fast charging capability 7 Physical Button Controls Easy and precise control with physical buttons perfect for on the go use Specifications GeneralSpecificationBrandSoundcoreModelC40iColorGrey GoldWearing TypeEarclips Clips onSensitivity83dBSpeaker12x17mmWaterproofIPX4Impedance22ΩFrequency Response20Hz 10kHzbluetoothbluetooth VersionV5 4Supported ProfilesHSP HFP A2DP AVRCPTransmitting Distance15mBattery ChargingPlayback Time7h Only Earbuds 21H with Charging Case Charging Time2hOther FeaturesMicrophoneYesSizeWeightProduct Weight0 0708kgPackage Weight0 1100kgProduct Size2 36 x 1 97 x 1 18 inchesPackage Size3 2 x 2 5 x 2 inchesPackage list2 Earphones1 Charging Case1 Charging Cable2 Pairs of Ear Grips 1 User Manual