The 1 earphone parameters:

Speaker diameter: diameter 40mm

Loudspeaker frequency response: 20Hz~20KHz

Speaker impedance: 32 ± 3

Horn sensitivity: 99 ± 3dB

A microphone head size: 6.0X5.0mm diameter

Microphone directivity: single point

Microphone impedance: ≤ 2.2K

The wire length: 2530 ± 30mm

Net weight: 245 ± 20g headphones

The plug diameter: diameter 3.5mm