SHARPER IMAGE SHP893GR Premium Ultra Bass HD Earbuds with Built-In Mic for All Devices, Green Compatible With All Devices Including All Generations of iPhones, iPads, Android Tablets, Android Smartphones, Laptops, PCs, Macs, Amazon Fire Tablets, MP3 Players,, Kindles, Galaxy Smartphones & Tablets, And Much More! Superior High-Definition Sound Quality With Ultra Bass Boost, Noise-Isolating Rubber Ear Tips Tangle-Proof Cable, Ergonomic Lightweight Design For Secure & Comfortable Fit Built-in Microphone For Hands-Free Calling, One Click Play & Stop Music, One Click Answer & End Calls Technical Specs: Frequency Range 20-20khz, Sensitivity 93 3 dB/mW, Impedance 16 Ohm, Unit Driver 9mm, Plug 3.5mm Stereo