Audio Technica SOLID BASS for iPod/iPhone/iPad Inner Ear Headphones Black ATH-CKS550i BK Newly developed 9.8mmDUAL MAGNETIC-FIELD DRIVER delivers massive bass sound.For Smartphone model. Remote Controller and microphone/Music and video play,pause,track forward,track back, volume adjustment,and calls on the iPhone,Siri Headphone part Model: dynamic type/Driver: 9.8mm/Output sound pressure level: 105dB/mW / Play frequency band: 5 ~ 24,000Hz/Maximum input: 100mW/Impedance: 16 Microphone part Model: condenser Directional characteristics: omnidirectional Sensitivity: -44dB (0dB = 1V / Pa, 1kHz) Frequency characteristics: 100~10,000Hz Weight (excluding code): about 7.5g/Plug: 3.5mm gold-plated stereo mini (L-type)/Code: 1.2m (Y type)/Accessories: pouch, earpiece (XS, S, M, L)