Sony MDR-NC31EM

Weight: 21 g
Design: Intracanal
Description: Design: in-ear, device type: wired headphones, design features: microphone, straight plug, plug connector: mini jack 3.5 mm
Additional Information: Digital noise reduction function; not compatible with devices that do not have a 5-pin audio jack
Plug connector: mini jack 3.5 mm
Impedance: 31 ohm
Design features: Microphone, straight plug
Device type: Wired headphones
Mount type: Without attachment
Maximum playback frequency: 20000 Hz
Minimum repeatable frequency: 20 Hz
Technology: Dynamic
Membrane diameter: 13.5mm