Functionality and Compatibility * HIGH QUALITY VOICE CALLS * UP TO 8 HOURS OF MUSIC LISTENING * BLUETOOTH 5.3 WIRELESS CONNECTION * The headphones are incredibly comfortable to wear. They are not uncomfortable to use, even after extended periods. * for Video Game, Common Headphone, For Mobile Phone,HiFi Headphone,Sport, For Outdoor, For Office, For Study Communication: Shape-memory silicone precisely conforms to the shape of the ear. Without a cord Bluetooth 5.1: 32 ohms of impedance One USB Type-C connector with a frequency response of 20 Hz to 20 kHz Reception: Ten meters 7 hours of operation and 2 hours of charging Indeed, a built-in microphone 300 mAh battery Composition: polymer