The 40 channel version of the General Electric 5810 was this GE 3-5811/5811B. The 5811 also utilized the 5-pin DIN microphone plug. Note that while the S/RF meter is the same size as on the previous 23 channel model, the graphics have changed. This meter design was shared with many Colt, Hy-Gain, and Midland CB radios of the day.