Features: 1. Lightweight treatment, earless design, easy and painless to wear. 2. Suitable for outdoor and indoor safety wear for riders. 3. Long standby time. 4. Intelligent noise reduction, high-definition calls, caller ID reminder 5. Intelligent voice prompts in Chinese and English (default is English). 6. The connection speed is extremely fast and the pairing is stable. 7. The callers phone number is displayed. 8. Works with all smartphones. Features: 1. Lightweight treatment, earless design, easy and painless to wear. 2. Long-term standby, up to 10 hours of continuous talk time. 3. Use smart one-to-two to connect two smartphones at the same time. 4. Easy to store soft silicone, easy to store and fold without deformation. 5. IPX4 sweat-proof. 6. HD call, caller ID reminder. 7. Quick connection and stable pairing. 8. Intelligent voice prompts in Chinese and English (default is English). 9. Works with all smartphones. Specification: 1. Version: V5.3 2. Supported protocols: A2DP AVRCP HFP 3. Transmission distance: 10M 4. Transmission frequency: 20HZ-20KHZ 5. Battery capacity: 75mAh 6. Talk time: 10 hours 7. Play time: 10 hours 8. Standby time: 140 hours 9. Charging time: 2 hours 10. Charging port: Type-C Packing list: 1. Bluetooth headset x 1 2. Charging cable x 1 3. Chinese and English manual x 1