Anker Soundcore Life U2i Wireless Bluetooth Neckband Headphone A3213H11 Features of Anker Soundcore Life U2i headphone: 10mm graphene actuators: Provides music with a wider soundstage and exceptional accuracy and clarity. Enjoy clear highs, lively mids and plenty of powerful bass from the 10mm graphene drivers. Soundcore's Life U2i Bluetooth headphones deliver wide dynamic range and rich bass via a custom algorithm. AI microphone for clear calls: Superior call quality features a built-in microphone with an AI algorithm that accurately picks up your voice, so you can enjoy crystal-clear calls when you're out and about