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F9 Wireless Earphone

2021 new F9 Twin wireless earphones BT 5.0 tws mini bluetooth earphones headphones mini bluetooth earbuds with charging box

Product Name F9 TWS Wireless Bluetooth Earphone 5.0 Touch Earphones 9D Stereo Sport Music Waterproof LED Display Airbuds Headset With Mic
Material ABS
Colour Black
Bluetooth version V5.0 Bluetooth Earphones
Support HFP 1.7, HSP 1.2, A2DP 1, AVRCP1.6, SPP 1.2 and PBAP 1.0
Charging Voltage DC 5V
Microphone sensitivity -42Db
Frequency response range 20-20000Hz
Sensitivity 120dB+/-5dB
Transmission Distance 20m
Charging box battery capacity  1300mah 
Headphone battery capacity 50mAh
Accumulated battery life  about 220 hours
Charging Time About 1 hours
Charge Time (for Charging Box) About 4.0 hours
Battery type polymer lithium battery