SHARPER IMAGE SHP886GR Ergonomic Angled Earbuds with Mic, Tangle Free, Green Compatible With All Smartphones & Tablets, Laptops, Android, iPhones, iPads, Kindles, MP3 Players In-Line Microphone For Hands-Free Calling, Lightweight Design Superior High Definition Sound Quality With Noise-Isolating Rubber Tips For a Secure Fit Ultra-Flexible Cable That Resists Tangles and Knots Frequency Range 20-20khz, Sensitivity 103 dB at 1 kHz, Impedance 16 Ohm, Unit Driver 10 mm, Plug 3.5 mm Connectivity Technology: Wired