Anker A3510 Manuel D'utilisation page 14

Specifications
Input
Rated output power
Battery capacity
Charging time
Talk time
Playtime (varies by volume
level and content)
Driver size
Frequency response
Impedance
Bluetooth version
Bluetooth range
5V 0.75A
5 mW
500 mAh
< 2 hours
Up to 24 hours (ANC off)
Up to 35 hours (ANC off)
40 mm
10 Hz - 20 kHz
5.0
30 m / 100 ft
EN 12