Hybrid Driver Unit: 40mm moving coil driver, 20*30mm multi-fold AMT Air Motion Technology Impedance 32 Ω +/- 15% at 1KHz, 179Mv Sensitivity: 110 +/- 3dB at 1KHZ w/Vrms input= 179Mv

In-Ear Headphones are perfect for the music listener.In this stylish and compact style headphone. It combine comfort, stability and high-quality audio. Bring you a new kind of auditory sense. Using skin-friendly silicon ear tips more comfortable fit for ear to sound more direct transmission of the eardrum ,and get better vivid and clear sound and bass response.Improve noise canceling performance. The multifunctional button for phone calls and music tracks also control next previous song, play pause music.Hands-free and built in microphone that you can easily pick up phone calls and talk on your phone everywhere and anytime.