A9

Quadruple Use Time - 4 hours of talk time and 6 hours of music time in earbuds. An additional 4 times battery life is provided for earbuds through the 320mAh charging case. Therefore, up to 48 hours of use time in a single headset rotating. Digital Power Display - Convenient to grasp the real-time power of the charging case and headphones' charging power level at any time to ensure timely charging for the charging case. Superior Audio - With 13mm dynamic speakers to create a wide sound field and balanced listening experience, Each sound details to the heart, so that you really feel the live-grade sound, in addition to the built-in microphone for clear calls.