Headphone part Type: dynamic /Driver φ8.5mm /Output sound pressure level :100dB /mW /Play frequency band :20~23,000Hz /Maximum input 200mW /Impedance 16Ω Microphone part Type: condenser /Directional characteristics :omnidirectional /Sensitivity :-44dB (0dB = 1V / Pa, 1kHz) /Frequency characteristic 100 ~10,000Hz /Weight (excluding code) :about 3.5g/Plug φ3.5mm gold-plated 4-pole stereo mini/Code :1.2m (Y type) Accessories: earpiece (XS, S, M, L), cord winder holder