With new developed "Dual chamber mechanism AR" that plays brilliant mid-high range sound and heavy bass sound. Comes with an extension cord with a microphone on a smartphone calls, operations, and volume adjustment possible. [Type] Dynamic [Driver Unit] phi 13mm [Sensitivity] 106dB/mW [Frequency Response] 5 to 26,000 Hz [Impedance] 16 ohm at 1kHz [Cord] 0.4 m / 1.3 ft. (Y-Type) [Maximum Input] 1000mW [Plug] 3.5mm gold-plated stereo mini plug [Microphone Element] Electret Condenser [Microphone Characteristic] Omnidirectional [Microphone Sensitivity] -40dB (0dB=1V/Pa,1kHz) [Microphone Effective Frequency Range] 100 to 10,000Hz [Weight] Approx. 12 g / 0.42 oz (Without Cord) [Include] 0.8m Extension cord (L-type), 0.8m extension cord with microphone for Smartphone (L-type), Pouch, Earpiece (XS, S, M, L)