SHARPER IMAGE SHP1106WH Sports Earbuds for Running and Exercise Activities with Built-In Mic, White Compatible With All Smartphones & Tablets, Laptops, Android, iPhones, iPads, Kindles Answer Calls Hands-Free With In-Line Microphone Superior High-Definition Sound Quality With Noise-Isolating Rubber Ear Tips Detachable Non-Slip Ear Hooks, Tangle-Proof Cable Frequency Range 20-20khz, Mic Sensitivity -40 4dB, Impedance 16 Ohm, Unit Driver 13mm, Plug 3.5mm