Bluetooth 5.4 compatible wireless earbuds with 48-hour playback. - Model: Wireless Earbuds - Playback Time: 48 hours - Charging Box: 40 hours of charging - Bluetooth Version: Bluetooth 5.4 - Driver Size: 14.2mm driver ANC & ENC Noise Cancelling: Our in-ear Bluetooth earbuds adopt advanced ANC technology. By emitting sound waves of opposite phase, they can reduce ambient noise by 45dB, allowing you to use them comfortably even in noisy environments such as trains and buses. Furthermore, the upgraded ENC technology provides clear call quality. These Bluetooth earbuds are the perfect partner for work, travel, and everyday calls. Bluetooth 5.4 & Transparency Mode: These wireless earbuds are equipped with advanced Bluetooth 5.4 technology. Compared to Bluetooth 5.3, Bluetooth 5.4 significantly improves speed, efficiency, stability, and sound quality. In addition, they also feature a transparency mode, making it easier to hear the surrounding sounds while listening to calls or music while driving or cycling, ensuring safety. Heavy Bass Stereo and 5 Equalizer Modes: Our wireless earbuds are equipped with a 14.2mm bio-carbon fiber dynamic coil, reproducing powerful low frequencies (down to 50Hz) and unique mid-high frequencies (up to 5kHz), achieving powerful heavy bass stereo sound. In addition, the wireless Bluetooth earbuds are equipped with 5 adjustable equalizer modes (Standard, Classic, Jazz, Rock, Pop), allowing you to easily switch between different music styles and enjoy the best listening experience. 48-Hour Playback: These Bluetooth earbuds can be used for 6-8 hours on a single charge, and can be extended to 48 hours with the charging case. The case can be fully charged in just 1.5 hours, making them ideal for sports, entertainment, work, travel, and everyday activities. In addition, the smart charging case displays the battery level of the earbuds and the case in real time, preventing unexpected power outages. Thank you for viewing.