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