These ergonomically-shaped, compact, noise isolating buds fit like a glove, combining comfort and vibrant style with really great sound. The cord slider also helps to keep your earbud tangle-free. ErgoFit design for ultimate comfort and fit. Virtual cavity technology (Creates high quality sound performance) Features: Copper Clad Aluminum Wire Noise cancelling: Noise isolating Driver unit: ø9 mm Frequency response: 20Hz-20kHz Impedance: 16ohms Sensitivity: 96dB/mW Max. input(mW): 200mW Cord length: 1.1 m Plug: Gold | Panasonic Ergo Fit Eardrops in Black