1. Double LED Indicator 37 Hours Playback Time: Two digital LED power indicators on the outside of the headphone bag display the charging status of both the bag and the headphones. The wireless headphones can be fully charged in under 1 hour via the TypeC fast charging port. When fully charged, each earbud provides 56 hours of continuous use, and combined with the 350mAh battery capacity of the charging case, the total playback time reaches up to 37 hours. 2. Strong Sound ENC Noise Reduction for Calls: The wireless headphones feature 13mm speakers and a threelayer composite diaphragm, delivering powerful bass, clear mids, and crisp highs. Each earbud has a builtin microphone for calls, and ENC noise reduction technology ensures your voice is heard clearly by the other party. 3. Upgraded Bluetooth 5.3: Equipped with the latest Bluetooth 5.3 chip and dualchannel transmission, these wireless headphones provide faster and more stable sound transmission with a range of up to 15 meters. Whether you're watching movies, listening to music, or making calls, the low latency and stable connection guarantee a seamless experience. 4. Ergonomic Design: Based on data from thousands of ear canal measurements, the Bluetooth headphones come with soft, tapered silicone ear tips in three sizes (S/M/L), ensuring a comfortable and secure fit for most users without causing ear fatigue.