The Astatic Model 636L Noise Cancelling Dynamic Microphone is ideal for CB, amateur radio and SSB communications. It fits all 4-Pin CobraUnidenand Galaxy radios, and effectively reduces wind and vehicle noise. Durable construction is combined with a polyurethane-coated steel grille and soft vinyl lip guard. It also includes Astatic's exclusive heavy-duty metal cord which is 7 1/2 feet long. Astatic's tailored frequency response provides maximum talk power.
Specifications:

• Type: - Dynamic Noise Cancelling
• Frequency Response - 100 to 5,000 Hz
• Output Level - -58dB (0dB = 1 mw/10 microbars), -76dB (0dB = 1 volt/microbar)
• Impedance - 200 ohms, matches any radio
• Cable - Six wire, five conductors, one conductor shielded, metal cord, with durable strain relief
• Connector - 4 pin female locking ring connector
• Switch - DPDT smooth operating, long life, trouble-free switch with spring return
• Housing - Durable molded black ABS Cycolac
• Package Type - Clamshell Packaging