Whether you are running, jogging or chilling the Scosche thudBUDS Sport Earbuds fit perfectly in to your ear to deliver great sound and isolate external noise. You can wear them as normal inner ear headphones but also in conjunction with earhooks in order to achieve a secure fit during exercise. These earhooks  are moulded to the curve of your ear and come included with the headphones along with 3 different sized silicone ear cushions for maximum noise cancellation. 4.3 ft Chemical Resistant TPE CableConforms to ROHS standardsDriver size: 10.5mm DynamicImpedance: 16 ohms OmegaFrequency Range: 20Hz to 20KHzSensitivity: 102dB +/-; 3dB at 1KHz (IEC-318 I/P Level: 1mW)Rated Power : 15mW, Max Power: 25mWSmall, Medium and Large Single Flange, Silicone Ear CushionsRobust strain reliefs