FeaturesUni-directional dynamic microphoneNo power source requiredDurable black plastic bodyFrequency Response: 100Hz-12kHzImpedance: 600 OhmSensitivity: -80dB +/- 3dB3m 1/4 inch jack cableIntegrated On/Off switch to mute microphone when not in useSize: 180x55mm eachA pack of microphones supplied in 3 popular colours, red, yellow and blue. These stylish low-impedance unidirectional Maplin 3 Pack Karaoke Dynamic Directional Microphones - Red, Yellow & Blue have a built-in on/off switch and are supplied with approximately 3m of cable terminated in a mono 6.35mm (1/4\") jack plug.