Hileo Hi6 Wireless Single Ear Hook Handsfree Call Noise Reduction In-ear Sports Earphone Features: 1. Super long standby, continuous playback for up to 28 hours. 2. Smart one-to-two, connect two mobile phones at the same time. 3. Intelligent voice prompts in Chinese and English (default is English). 4. Turn the one-button switch. 5. Intelligent noise reduction and high-definition calls. 6. The connection speed is extremely fast and the pairing is stable. 7. The callers phone number is displayed. 8. Works with all smartphones. Specification: 1. Version: V5.2 2. Supported protocols: A2DP AVRCP HFP 3. Transmission distance: 10M 4. Transmission frequency: 20HZ-20KHZ 5. Battery capacity: 220mAh 6. Talk time: 28 hours 7. Play time: 36 hours 8. Standby time: 240 hours 9. Charging time: 2.5 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