Type: sealed very comfortable wearing

Driver: 40MM Note: Some poor quality MP3 would be more difficult to drive

Sensitivity: 99dB

Frequency response :500-2000HZ very suitable for high school bass is more balanced listening to pop music

Maximum input power: 0.2 W outset not to open a new headset to be too high， to slowly burn Oh!

Impedance: 32 ohm

Material: ABS high-quality plastic

Plug: 3.5MM gold-plated plug Universal

                   For computers， laptop computers， MP3， MP4 and some phone 3.5mm Interface

Cable length: OEM 0.8 M / 1.2M