Type: Earbud Driver Unit: 9mm Frequency Response: 10Hz-23KHz Input Impedance: 16 ohms Sensitivity: 100 dB/mW Cord Length: 2ft single sided, 2ft extension cord also supplied Weight: 0.21 oz. without cord Features: Earbud-style deliver rich sound with deep bass Moisture guard for moisture to pass around head phones Short cord (2 feet) & extension (2 feet) is supplied 3 sizes of soft hangers for secure and comfortable fit Can also be standard earbuds by detaching soft hangers