The Neodymium speaker drivers provide superb sound quality. Speaker Diameter (Driver): 9mm Magnet Type (Driver): Neodymium Cable Length: 1.2 meters Plug Type (Jack): 3.5mm Maximum Power: 3mW Frequency Range: 20Hz - 4.0KHz Impendance: 16 Ohm Sensitivity: 102dB Pack Dimensions: 88 x 130 x 27mm (W x H x D) Product Weight: 13 grams