NEW Workman DM-507 dynamic microphone. Replacement mike wired for Realistic, Radio Shack CB radios with a 5 pin DIN microphone connector. Rugged construction with high quality housing and metal hanger. SPECIFICATIONS: Sensitivity: -70+/- 3dB (at 1KHz)Impedance: 500 ohmFrequency Response: 300~6KHzWIRING:Pin 1 - GroundPin 2 - N.C.Pin 3 - TXPin 4 - AudioPin 5 - RX Visit our eBay store for other radio accessories.