Product details of New 100% Original Air + TWS BTH-F9-5 Wireless Earbuds LED Display | Low Latency 9D HIFI Audio Bluetooth Earphones Headset with Mic & Magnetic Power Bank Comfort in Ear Color: Black version: V5.0 Charging voltage:DC 5V Microphonesensitivity: -42db Workingtemperature: -10-50°C Frequency responserange: 20-20000Hz Sensitivity: 120db+/- 5db Transmissiondistance: 10m Charging time:about 1 hour Listening time:about 4-5 hours Cumulative batterylife: about 220 hours Earphone batterycapacity: 50mAh Charging boxbattery capacity: 1500mAh (actually about 1200-2000mAh)