SHARPER IMAGE SHP891BL Premium Tangle Free Earbuds with Mic Compatible with All Devices, Blue Compatible With All Smartphones & Tablets, Laptops, Android, iPhones, iPads, Kindles In-Line Microphone For Hands-Free Calling Superior High-Definition Sound Quality With Noise-Isolating Rubber Ear Tips Flat Cable That Resists Tangles and Knots Frequency Range 20-20khz, Sensitivity 98 dB +/-3dB, Impedance 16 Ohm, Unit Driver 8mm, Plug 3.5mm Connectivity Technology: Wired