The H2002E model Composition: ABS, cotton, and metal components Interaction: Wired Function: Over-Ear Headphones, Microphone Principle of Vocalism: Dynamic 50mm speaker 64±15%Ω is the impedance. It is sensitive to 95dB±3dB. Response frequency: 20 Hz to 20 kHz Mic: Ø6.0 x 2.7 mm Length of Cord: 2.1m 3.5mm plug Weight of the product: 259g