The EC-2000 (EC2000A) ECM (electret condenser microphone) is yet another of the RF Limited "Road Noise" toys.  Instructions and wiring charts are included.

Features

• Operates on 9V battery
• Sensitivity -25dB @ 1000Hz
• Impedance 1Kohm
• Frequency Response 150-3500 Hz
• Echo Frequency Response 200-3000 Hz
• Echo time maximum .180m second
• Battery 9Vdc (006P or PP3) with life of 70 continuous use hours
• Internal noise -0.6mV
• 4-Pin Lock ring for Cobra/Uniden/President

Note:  When using this product with Uniden PC144, Pc244 and Cobra 146GTL, the Talk Back circuit is not compatible and may cause problems with transmit audio, but can be solved by removal of the TB control.