Record pilot radio communications or ground commentary alongside your video.
The reacro system has a 4-pin 3.5mm CTIA audio jack — the same standard used by most smartphones. You can either plug in a microphone directly or connect a radio to record comms.
What You Need
| Setup | Radio Type | Parts | Search Terms |
|---|---|---|---|
| Microphone | N/A | 4-pin CTIA lavalier mic | “4-pin TRRS lavalier microphone for mobile phone” |
| Radio direct | Baofeng / Kenwood | Kenwood 2-pin to 3.5mm TRRS cable | “Kenwood 2-pin to 3.5mm 4-pole cable” |
| Radio direct | Wintec / Motorola | 1) Mic/speaker splitter + 2) 4-pin male-male cable | See below |
Option 1 — Microphone
Plug a 4-pin lavalier microphone into the audio jack on the reacro system.
Warning: You must use a 4-pin (TRRS) microphone — the kind sold “for mobile phones.” 3-pin (TRS) or 2-pin versions will not work.
Example products: - Lavalier mic (4-pin) - Lavalier mic option 2 — select the 3.5mm version
Search term: “4-pin TRRS lavalier microphone for mobile phone 3.5mm”
Option 2 — Direct Radio Connection
Baofeng / Kenwood radios
These radios use a Kenwood-style 2-pin connector. A single cable connects the radio directly to the reacro audio jack.
- Cable: Kenwood 2-pin to 3.5mm
Search term: “Kenwood 2-pin to 3.5mm 4-pole audio cable”
Connections: Kenwood 2-pin plug → radio, 3.5mm plug → reacro system.
Wintec / Motorola radios
These radios use a single 3.5mm jack that carries both speaker and microphone signals, so you need two parts:
Mic/speaker splitter cable — splits the combined signal into separate mic and speaker jacks. This plugs into the reacro system.
Important: Get a speaker + microphone splitter, not a headphone splitter (which splits into two identical outputs).
- Example: Mic/speaker splitter
- Search term: “3.5mm TRRS to TRS mic speaker splitter”
4-pin 3.5mm male-male cable — connects the radio’s audio jack to the splitter’s input.
Connections: Radio → male-male cable → splitter → reacro system.
Troubleshooting
- Audio is very quiet / very loud — Make sure the correct source is selected in the reacro UI (microphone or radio)
- No audio recorded — Check that your microphone or cable is 4-pin (TRRS). A 3-pin (TRS) plug will not make contact with the microphone ring on the CTIA jack.