1.Sensitivity at 1KHz : 105+/-3 dB; 2.Impedance : 32+/-15% Ohm; 3.Speaker dia : 30mm; 4.Mylar : 12? 5.Frequency response : 150-10000Hz; 6.Input power : Nom5mw,Max15mw; 7.Distortion : Less than 5% at 1KHz 5mw; 8.Weight : Approx49+/-3 grams; 9.connector : 3.5mm; 10.Cord length : 150cm; 11.color:Red & black. 12.MIC: Sensitivity: -58?dB(0dB=1V/ at 1KHz) Impedance: 2.2K Current consumption: 500 A(vmax) Standard operation voltage: 3.0V