Discover a new dimension of sound with Cellularline Music Sound Flow wireless headphones. These advanced in-ear headphones not only deliver immersive sound quality, but also give you absolute freedom thanks to Bluetooth 5.3 TWS technology. Thanks to their ergonomic design, you can enjoy music and calls without cables, giving you the ability to move with total freedom. The headphones use the new version of Bluetooth 5.3 wireless technology, which reduces delays, interference and improves battery life. Thanks to the voice microphone, the headphones optimize the quality of phone calls, allowing you to communicate clearly and clearly no matter where you are. The auto-pairing function makes using these headphones even more intuitive. Once removed from the case, both headphones automatically connect to each other, ready for immediate use. The case included with the headphones allows you to charge them up to 4 times, giving an impressive total of 25 hours of playback. This means you don't have to worry about interrupting music playback during the day - you'll always be ready for another batch of your favorite songs. Product features: · Bluetooth version: 5.3 · Communication range: up to 10 meters · Multi-function touch button to answer/end calls, pause/play music, skip to next song · Built-in microphone · Compatible with smartphones, tablets and laptops · Music playback time: up to 6 hours · Total playback time: up to 25 hours · Case battery capacity: 250 mAh · Headphone battery capacity: 30 mAh x2 · Headphone charging time: approximately 1 hour · Charging time of the case: about 1.5 hours · Standby time: 150h · Weight: 33g · Package contents: headphones, charging case, USB-A to USB-C cable, manual