E. C. I. Courier 1M

## Overview
The COURIER COURIER 1M is a Citizens Band transceiver engineered for two-way voice communications across standard radio frequencies. The unit features dedicated microphone switching circuitry to isolate audio transmission and receive pathways.

## Technical Specifications
| Attribute | Details |
| — | — |
| Manufacturer | COURIER |
| Model | COURIER 1M |
| Product Category | Citizens Band (CB) Transceiver |
| Microphone Audio | Pin 3 |
| Shield / Ground | Pin 4 |
| TX / PTT | Pin 0 |
| RX | Pin 1 |
| Switch Line | Pin 2 |

## Physical Description
The radio is housed in a durable metal chassis designed for tabletop or mobile installation. The front control panel houses standard operating dials along with the dedicated multi-pin microphone connection port.

## History
Produced under the COURIER brand, the COURIER 1M served consumer and commercial communications needs during the peak era of mobile CB radio operation.