Features: 1. Integrated BT 5.1 chip, offers fast speed, stable connection, allows transmission of 10-15 m without obstacle. 3. Effectively block external noise, and real-time audio calibration can maintain a high-quality listening experience. 4. Ergonomically designed to fit each ear perfectly. Perfect for exercise, running, sports and games. 5. The indicator light display shows the remaining battery power of the cordless headset clearly, then you have the charge status of your device at all times. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Bluetooth-Compatible version: V5.1 Transmission distance: >10m Battery capacity: 50mAh Charging station battery capacity: 300mAh Standby time: 180H Operation Mode: Touch Noise reduction version: CVC8.0 includes: 1 set of Ears