Shure SM10A-CN Headworn Microphone - Low-Impedance Unidirectional Dynamic Mic with Cable Close-talk design provides excellent isolation and minimizes gain-before-feedback. Extremely rugged with fully adjustable headband and microphone boom. Unidirectionalcardioid polar pattern for superior rejection of unwanted sound. A clip that fits over the XLR connector and attaches to the users belt or waistband, providing cable strain relief.