These are the ones I accidentally purchased too many of. New, unopened, shrink wrap still on. With the earbuds only, you can continuously play music for about 7 hours. When used with the charging case, you can play for about 28 hours. A quick 10-minute charge provides about 3 hours of music playback. You can enjoy music all day long without worrying about charging. 【Stable Fit Even During Exercise】 Nickel-titanium shape memory alloy, used in medical devices such as stents, aerospace industry, and robotics, and 35A liquid silicone, which is highly biocompatible, gentle on the skin, and less likely to cause allergic reactions, are used to achieve a comfortable and secure fit all day long. 【Comfortable Fit with Three Stabilization Designs】: C-bridge Design, formed with the optimal curve by analyzing over 10,000 auricle data and making fine adjustments to the shape. Triangular design that improves the stability of the earphones with three support points by adjusting the weight of the three center-of-gravity parts: the acoustic ball, C-bridge Design, and battery. The center-of-gravity balance design, designed with the most stable balance, makes it difficult to shift or fall off even during intense exercise. 【Reduced Sound Leakage】: Directional audio transmission technology reduces sound leakage by emitting sound waves of opposite phase on the opposite side of the speaker that emits sound. 【IP57 Waterproof Specification】: Equipped with a special waterproof microphone, allowing you to exercise without worrying about sweat or rain. Supports HUAWEI's first IP57 level of waterproof. 【Excellent Sound Quality】: Equipped with a 17x12mm high-sensitivity driver unit. PEN titanium coating is applied to the high-frequency range to reproduce rich and high-resolution details. Soft and elastic PU titanium plating composite diaphragm is used in the low-frequency range to achieve punchy bass. High-performance neodymium magnets are used to achieve high driving force, realizing a small size and high volume. Connectivity Technology Bluetooth, Wireless Wireless Communication Technology Bluetooth Material Silicone Charging Time 40 minutes Compatible Devices iPhone, Android, Tablet, Smartwatch, Laptop Item Weight 8.91 grams Water Resistance Level Water Resistant