Special Features:

A subminiature, electret condenser headworn microphone ; provides uncompromised sound quality and reliablity with minimal visibility in applications such as broadcast, theater and touring; despite the small size, the condenser element delivers full, clear, and natural reproduction of speech and vocals; microphone features a durable, low-profile wire frame headband which is fully adjustable for stability and comfort; plastic carrying case protects the microphone and its accessories

Properties:

A microphone which depends for its operation upon variation of its electrostatic capacitance.