Seamless ergonomic fit characterized by its round and plump but endearing shape with smooth curves. Engineered for all day long wearing. HD stereo and crystal-clear call with 4-mic and DSP ENC technology even in noisy environment. EarFun Air’s one of the few true wireless earbuds that utilizes the optimal solution of bonding capacitive in-ear detection and single-button capacitive sensor chip together. Fully IPX7 waterproof secured by the Innovative SweatShield tech and hence applicable for multi-occasions. Smooth master-slave switch function, doubling the playtime. 30-hour uninterrupted playback. Siri or Google Assistant.