USB C port for charging 1.5 hours for charging, 5 hours for phone calls, and 8 hours for music playback Time on standby: 12 months The charging case weighs 52.6g, while the solo earbud weighs 7.5g±0.2g. Size of earbuds: 16.10 x 41.51 x 49.60 mm Dimensions of the charging case: 66.71 x 66.28 x 28.97 mm 1. Ergonomic design, custom embedded 0.7mm ultra thin flexible wire, and comfort -The double-layered silicone used for the ear-attached portion is incredibly soft and skin-friendly. 2. Personalized speaker, high-fidelity audio -High sensitivity and high amplitude driving unit -The flexible upper arc ring of the edge is composed of a lightweight polymer. -Ample bass experience is brought about by low distortion and high amplitude. -Super-straight and double-layer carbon fiber are used in the middle dome structure. -A powerful and steady high-frequency output is produced by the combination of high stiffness and light weight. 3. Directional sound transmission and privacy protection -Enhanced directed sound field technology