Brand Name: UFQ U Fly Quiet Type: Headset High-concerned chemical: none Origin: Mainland China Noise Cancelling: Passive Noise Cancelling Cable length: 150cm Noise Reduction Ratings (NRR): 24 DB speaker type: Dynamic (F40) Impedance: 150 ohms (300 ohms each; wired in parallel) Earphone Plug: PJ-055( .25"F6.3 phone plug) Microphone Plug: PJ-068( .206"F5.2 phone plug) color: black Boom: flexible boom