Bluetooth 5.3 and One-Step Auto Pairing: Csasan wireless earbuds adopt the most advanced bluetooth 5.3 technology, providing you with 2X faster transfer speeds (80% higher than the previous generation) and a more stable connection, with almost no delay. Whether you're making calls or sports, there's no need to worry about signal interruption. Once the bluetooth earphones are connected for the first time, simply open the charging case and the ear buds will automatically connect to your phone. Immersive Sound and ENC Noise Cancelling Mics: These wireless earphones adopt a unique stereo design with 13mm big composite diaphragms and AAC codec to produce professional-grade sound. The bluetooth headphones are equipped with ENC noise reduction double mics to passively cancel 80% of background noise, allowing you and the caller to hear each other better and make crystal-clear calls with minimal background noise. 40 Hours Playtime and LED Display: These bluetooth earbuds provide up to 6-8 hours of high-quality sound output on a single 1.5-hour charge, and the included charging case provides an additional 4 charges, giving a total playtime of 40 hours. They feature a smart LED digital display, allowing you to easily monitor the battery consumption of both the wireless ear buds and the charging case so you can know when to charge them. You'll never have to worry about battery life even on long trips. Touch Control and Ergonomic Design: J90 Pro wireless earbuds bluetooth are equipped with sensitive touch control panels on both the left and right earbuds, allowing for flexible control of music playback, answering or rejecting calls, adjusting the volume, switching music etc. Wireless earbud also come with 3 different sizes of ear tips (S/M/L) and a unique earplug design that disperses pressure and ensures a comfortable fit, allowing you to safely enjoy your own music without any discomfort. IP7 Waterproof and Wide Compatibility: Wireless headphones use IP7 nano-coating technology to seal the surface of both earbuds and prevent sweat or rain from entering. Internal nano-coating protects against airborne moisture that could damage the components. Allows you to use in ear earbuds in any weather and working out situation, makes them an ideal companion while running, yoga, cycling etc. In ear headphones compatible with most Bluetooth-enabled devices. this is a good product