## 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.