Awei T28 True TWS Bluetooth Smart Touch Sports Dual Earbuds come with V5.0 Bluetooth Version, 20-20000Hz Frequency Response, 500mAh Charging Case Battery Capacity, and 35mAh Earbuds Battery Capacity. These earbuds provide 300 HOURS of Talk Time, 3.5 HOURS of Music Play Time, and 1 HOUR of Charging Time. These earbuds have DC 5V Charging Voltage. This new earbud has built-in high-quality driver units for great sound quality and listening experience and also works with Bluetooth 5.0 chip for a stable connection. In these earbuds, Auto pairing by taking it out of the charging box is convenient to use. It’s an Ultra mini design for comfortable wear and easy carrying.