Product parameters: 1. Bluetooth version: V3.0 + EDR 2. Frequency range: 2.4-2.5Ghz. 3. Sensitivity: 115dB 4. Standby time: 120h 5. Duration of listening to songs: You can listen to songs continuously for 6 hours. 6. Call duration: can last for 3 hours. 7. Support 128m-32G TF, SD card. 8. Audio frequency: 87.0-108.0MHZ (can search frequency manually and automatically) 9. Charging time: within 3 hours 10. Battery capacity: Rechargeable lithium battery 300mAh
