Features include: * BLUETOOTH 5.3 WIRELESS CONNECTION * HIGH QUALITY VOICE CALLS * UP TO 8 HOURS OF MUSIC LISTENING The headphones are incredibly comfortable to wear. They are comfortable to use even for extended periods of time. Specifically tailored to the shape of the ear, shape-memory silicone * for video games, common headphones, mobile phones, hi-fi headphones, sports, outdoor, office, and study communication: Wireless Impedance (ohms) for Bluetooth 5.1: 32 One USB Type-C connector with a frequency response of 20 Hz to 20 kHz Ten meters is the reception distance. 7 hours is the working time. Time needed to charge: two hours Microphone: integrated, indeed 300mAh battery Composition: plastic