5units Sennheiser HSP4-EW Headworn Mic for Evolution Wireless, Cardioid------$600usd
Main Features:
Cardioid pick-up pattern
Permanently polarized platinum condenser capsule
Microphone cap with integrated windscreen
Excellent feedback rejection
Individually adjustable to all head sizes
Neckband design keeps the microphone clear from shirt-collar or clothing
Extremely thin microphone boom can be attached to the left or right side
Microphone boom is adjustable in length and angle
Connection cable can easily be interchanged
All metal parts coated in a physical vapor deposition process
Specifications:
Transducer: Condenser
Polar Pattern: Cardioid
Frequency Response: 20Hz to 20kHz
Signal-to-Noise Ratio: 28dB (A)
Maximum Input Sound Level: 150 dB
Power Requirements: 4.5 15V
Output Impedance: 1k ohms
Output Connectors: Locking 1/8" (3.5mm) Mini
Diameter of Boom: .04" (1.1mm)
Cable Length: 5.25' (1.6m)