Long-time Enjoying: Up to 25 hours of music time or 600 hours of standby with a full charge; battery level indicator with iOS devices to keep track easily,High-quality Sound: Latest Wireless Bluetooth 5.0 Technology with A2DP stereo music, clear sound, ideal for high quality music. Powerful audio driver offers balanced audio and crystal clear sounds with dynamic base performance.,Noise Cancellation Technology: Built-in microphone with CVC6.0 noise cancellation let you get high quality, handsfree phone conversation with clear voice even in noisy environment like inside a gym and running/cycling on the road.,Comfortable Fit with Sport Style: Behind-the-head design for luxury comfort; foldable arms for protective storage and easy portability,Package Content: Besign SH03 Sport Bluetooth Headphones, USB Charging cable, User manual, Travel Pouch.