Sony Headset DR-220DPV. Device connectivity: Wired, Cable length: 3 m. Headphone frequency: 40 - 20000 Hz, Headphone sensitivity: 100 dB, Magnet type: ferrite. Microphone frequency: 300 - 20000 Hz, Microphone sensitivity: -40 dB. Weight: 110 g. Connector(s): Single sided