Frequency range: 20-20，000HZ

Sensitivity: 93±3dB

Impedance: 16Ω

Features:

Super cost-effective earphone.

Closed design， effectively isolate from outer noise.

High-end quality， no damage to the sound.

Flat design earphone， easy and comfort wearing.

Expansive sound range.
Best gift for friends and colleagues.

Package Included: 

1 x BYZ-S366 3.5mm Headset