High Fidelity Audio: 6 mm enhanced dynamic drivers deliver rich, clean sound. MEMS microphone technology allows you to make clearer calls USB-C Quick Charge: The earbuds alone provide up to 5 hours of energetic sound output on a 1.5-hour quick charge. The included charging case charges the earbuds up to 5 times, supporting an additional 25 hours of use, and keeps the earbuds safe & secure Convenient Touch Control: Effortlessly manage audio playback & calls with the multi-function touch button and mic on each earbud. The earbuds can even be used alone like a Bluetooth headset One-Step Connection: Simply open the case, the earbuds will automatically connect to your phone (after being paired the first time). Stable, efficient wireless connection with Bluetooth 5 and a specialized antenna for solid signal that resists interference Package Contents: AUKEY EP-T21S True Wireless Earbuds, Charging Case, Three Pairs of Ear-Tips (S/M/L), USB-C Cable, User Manual, Quick Start Guide