DUDAO U20-W clip-on bluetooth earphone

BTversion: V5.4
Bluetooth solution: Jieli 6973D4
BT range: ≧10 meter
Frequency response: 50Hz~10KHz
Speaker type: Ф12mm@32ohm 
Earphone Battery Capacity: 35 mAh
Charging Case Battery Capacity: 400 mAh
Charging input criteria: DC5V / 300mA TYPE-C
Charging time: 
Charging case : about 1.5 hours 
Earphone : about 1.5 hours
Standby time: about 4 months (Fully charged) 
Talk time: about 5 hours (80%volume)
Music time: about 6-7 hours (80%volume)

1. clip-on design, more  comfortable
2.New BT 5.4 wireless chip, faster, more stable,Low latency