The microphone shall be an extremely light head-worn design. The microphone shall use a dual-diaphragm transducer with a frequency-independent omnidirectional polar pattern. The transducer element shall be protected from penetrating water. An additional moisture shield shall protect the transducer element from perspiration and makeup flowing along the microphone arm. The microphone shall be available in matte skincolor or black finishes and meet the following performance criteria: frequency response: 20 to 20,000 Hz, sensitivity: 8 mV/Pa, electrical impedance: <3k5 ohms, power requirement: 1.5 to 12 VDC. The microphone shall be fitted with a 1.5 m (5 ft.) cable and its net (exclusive of the cable)/shipping weight shall be 15/325 grams (0.5/11.5 oz.).
