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A useful service-aid for holding boards and equiment, whist performing intricate jobs and inspections. Many other useful applications. Real Glass Lens (x3 Magnification) with strong metal stand and attachments. Versatile adjustments and joints.
Electret Microphone Insert (Condenser Mic Insert). dimensions: 11 x 7mm. Impedance 300-1000 ohms. Freq response 50Hz to 12KHz. Works from 1-10VDC. Small battery will power this unit such as SG13S. 2 Solder Contacts on the back. Change 1K resistor to lower value for lower battery voltage.