This is a listing for the charging case and the earphones themselves. The charging port is USB-C. * Equipped with a Qualcomm QCC3020 chip for high-quality sound reproduction, supporting AAC and aptX codecs. * The earphones alone provide 9 hours of playback, and with the charging case, up to 36 hours of continuous playback is possible. * Compliant with IPX8 waterproof standards, protecting the earphones from water, sweat, and rain. * Supports quick charging, allowing for 2 hours of continuous playback with a 10-minute charge. I have used it a few times. There are no problems.