【Immersive Sound Quality】Earaku wireless earphones reproduce rich sound with independent high-frequency units, capturing details clearly. The 18mm dynamic driver provides deep, clear bass. The deep bass, vibrant vocals, and delicate instrumental sounds spread throughout the ears, giving you the feeling of listening in the front row of a concert hall. Furthermore, the sound wave control technology prevents sound leakage even with the open-ear design, minimizing sound leakage and enhancing immersion. 【Open-Ear Comfort & Comfortable Fit】Earaku Bluetooth earphones feature an open-ear design that doesn't block the ears, preventing fatigue and stuffiness even after long hours of use. Weighing only 9.4g per earbud, the Sportee A809 adopts an ergonomic design based on the shape of the ear, providing a skin-friendly, natural fit for comfortable wear. Compared to other bone conduction earphones, it is lightweight and fits snugly in the ear, making it less likely to cause pain or discomfort during extended use. 【Safety with Awareness of Surroundings & Clear Calls】Earaku's signature open-ear design is perfect for the ultimate multitasker! Enjoy music while staying connected to the world around you, whether commuting, working, or working out. The microphone equipped with advanced noise-canceling technology almost completely eliminates ambient noise, keeping calls clear. 【Latest Bluetooth 5.4 Chip & Multipoint Connection】The Bluetooth earphones use a Bluetooth 5.4 chip and multipoint connection, enabling instant connection within a range of up to 10 meters, providing stable connectivity and low latency. You can easily answer calls on your smartphone during a video conference while listening to music on your PC. It can be easily paired with various devices and is compatible with a wide range of models, including smartphones, tablets, and PCs. 【Up to 36 Hours of Playback & Type-C Fast Charging】With the charging case, you can enjoy up to 36 hours of playback. A single charge provides up to 11 hours of battery life. Furthermore, a 10-minute quick charge provides 2 hours of playback, making it convenient for on-the-go use and commuting. The Bluetooth earphones also feature Type-C fast charging, allowing for a full charge in approximately 1.5 hours.