Features: 1. Integrated BT 5.0 chip, offers fast speed, stable connection, allows transmission of 10-15 m without obstacle. 2. Compatible with mainstream devices with BT function, suitable for multi-platform, multi-system, and major brand mobile phones. 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. LED digital 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. Description: Color/Style: As the picture shown Charging box siez: 12*9*3.5cm BT version: V5.0 Material: ABS+PCBS+Plating Effective straight-line distance: more than 10 meters Speaker: copper ring 13mm Battery: earphone-40mAh, charging box-350mAh Play time: 4-5H Standby time: 120H Full charge time: about 0.5 hours