Promax headphone same apple model

Model: X-HP1 headphones

BT version V5.1

Working distance: 2 10M

Charging port: Type-C

Battery: 400 mAh

Charging time: about 2.5 H

Standby time: about 400 H

Taking time: about 40 H

Music play time: about 40 H(70% volume)

Dual Device Connection

Speaker Driver Units: $40mm

Impedance: 32+20v

Speaker Sensitivity: 110db 3db

Frequency response: 20Hz~20KHz