Featured with a more efficient wireless 5.0 solution, enjoy a quick connection when opening the cover, a wider communication distance, and lower delay. Automatic switching of primary and secondary earphones is supported, allowing for seamless transitions. Enjoy balanced battery performance and improved battery life. A built-in capacitive sensing element enables double touch to hang up or answer the phone, play or pause music, and wake up the phone's voice assistant. Experience balanced three frequencies with mellow bass, fine alto, and melodious treble.