Apple In-Ear Headphones with Remote and Mic for the new ipad 3 3rd gen etc. Apple In-Ear Headphones with Remote and Mic Frequency response: 5Hz to 21kHz Impedance (at 100Hz): 23 ohms Sensitivity (at 100Hz): 109 dB SPL/mW rivers: Custom two-way balanced armature (woofer and tweeter in each earpiece)