Next-Gen Bluetooth 5.4: The earbuds wireless bluetooth uses the latest Bluetooth 5.4 chipset, which increases the connection speed by 80%, twice the speed of the previous generation chip. The wireless earphones adopts an enhanced low-latency design, with an audio transmission delay of only 40 milliseconds, ensuring seamless connection within a range of 15 meters, allowing you to experience lossless sound quality without interruption. Clear Sound Quality, Smooth Calls: The running earbuds are equipped with a large 14.2mm built-in driver, a high-resolution decoder and a unique three-layer composite diaphragm design, which enhances the bass by 43% to prevent sound distortion and bring you vivid and detailed sound quality. During use, the noise cancelling earbuds are supported by four ENC microphones to eliminate 80% of background noise, ensuring clear calls even in noisy environments such as traffic, gym or office. Get Rid Of Battery Anxiety: The total playback time of over the ear earbuds is up to 48 hours. After a single charge, each earbuds with ear hooks can be used for up to 8 hours at 50% volume.