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Wearing method: earplug Headphone output source: universal Plug diameter: 3.5mm Plug type: L-bend Whether wireless headphones: wired headphones With or without a microphone: Yes Sound principle: dynamic Frequency response range; 20-20000 (Hz) Impedance: 32 () Sensitivity: 106 (dB) Wire length: 1.2 (m) Horn diameter: 10 (mm) Earplugs / earmuffs material : ABS Headphone wire material : TPE