A compact Bluetooth earphone designed for clear sound, comfortable wear, and reliable performance throughout the day. Features: Composite diaphragm delivers high-fidelity sound with rich audio details and a balanced three-frequency processor for precise sound reproduction. Ergonomic in-ear noise cancellation ensures a snug fit, combining ENC call noise reduction for effective noise isolation during sleep or daily use. Upgraded Bluetooth 5.3 enhances wireless connectivity with lower power consumption, stable transmission, and strong interference resistance for an immersive listening experience. Audio-video synchronization with special stereo sound effects creates an immersive experience. Automatically connects when removed from the case, supporting both single and dual-ear listening for added convenience. Equipped with a large-capacity lithium battery, offering 4 hours of playback with a 30-minute charge and up to 24 hours with the charging case. Widely compatible with Android, iOS, Windows, and other Bluetooth-enabled devices for instant connectivity. Ergonomically designed for extended wear during exercise without swelling or discomfort, ensuring a barely-there feel for every workout. Invisible wireless earbuds fit securely in the ear canal, offering a stable, cable-free experience. Built-in noise reduction chip combines active and passive noise cancellation to block out environmental distractions effectively. Specification: Material: ABS Earphone Battery Type: 30mAh Lithium Battery Charging Case Battery Type: 300mAh Lithium Battery Power Supply Method: USB Charging Cable Power Supply ( Power Adaptor Not Included ) Size(LxW): 3.8 x 3.8 cm Package Content: 2 x Bluetooth