Telephone and Multimedia Headset and Microphone

Mono headphone with Ø.11" drive unit, with microphone, RJ-type connection adapter provided for telephone connection.
Headphones: drive unit: 1.1"diameter, cable length: 5.6ft, max. input power: 30mW, impedance: 150ohm, 1/8" plug.
Microphone: type: electret condenser, directivity: omnidirectional, 1/8" plug.