Dynamic MIC Microphone w/Extra Adapter Karaoke Systems & Computers 3.5mm & 6.3mm 6.3mm & 3.5mm ADAPTERS;Impedance: 600 ohm +-15% Frequency response: 100-12,000 Hz Sensitivity: -76dB +- 3dB AT 1000Hz Packaged Dimensions: Approx. 6 x 11 Inches Weight included package: Approx. 5.5 oz. (back pack indicated weight is not accuracy )