Technical Specifications
| Attribute | Details |
|---|---|
| Manufacturer | ALPINE |
| Model | BR640 |
| Product Category | Transceiver |
Mic Wiring
Pin 1 – Mic Audio
Pin 2 – Shield / Ground
Pin 2 – Switch Line
Pin 3 – RX
Pin 4 – TX / PTT
Notes: Jumper pins 4 & 5
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