OPEN-EAR DESIGN: The YYK-Q28 open-ear Bluetooth headphones feature a revolutionary ergonomic design that allows you to stay tuned to your surroundings while enjoying your favorite music. With this innovatively designed sports open earbud, you can hear external sounds clearly without compromising comfort. This open-ear Bluetooth headset has a unique shape that does not need to be inserted into the ear canal, and will not cause ear pain due to long-term wear.Bluetooth 5.43 Enhanced Connection: Experience faster and more stable transmission speeds with Bluetooth 5.3 technology. Our wireless headphones pair and connect seamlessly with your smart device, ensuring high-quality sound, ultra-low latency, and perfect synchronization. Enjoy your music without any signal loss or interruption. The Bluetooth headphones are equipped with flexible touch controls, allowing you to perform all functions with just one tap.40 Hours of Non-stop Music & LED Digital Display: The open-ear bone conduction headphones have a standby time of up to 80 hours and can play continuously for 8 hours on a single charge. The included lightweight and compact magnetic charging case provides an additional 32 hours of playtime, ensuring you never run out of music. It takes only 1.5 hours to fully charge via the fast-charging Type-C data cable (included).True bone conduction, wide compatibility: With our human vocal cavity and special digital sound enhancement technology, the designed acoustic space provides clear and unique HI-FI sound, optimizes audio performance, and brings a more realistic listening experience. This wireless earphone Bluetooth can effortlessly connect to almost any Bluetooth-enabled audio device, providing you with the versatility to use various types of devices as needed.0.26 oz Lightweight, Comfortable to Wear: Each earbud weighs only 0.26 oz, with a 0.7mm memory-flexible titanium alloy frame and skin-friendly silicone for a refined look. Sturdy and comfortable, providing seamless, all-day wear. The titanium alloy frame adapts to the curve of the ear to ensure that it maintains the best shape when worn for a long time. The skin-friendly silicone has a soft touch and medical-grade cleaning properties to promote high skin adhesion, eliminate discomfort, and keep you healthier all day.