Your transmitter and receiver must speak the same protocol. ExpressLRS is the open-source favorite for FPV, with 2.4 GHz and 900 MHz versions. TBS Crossfire is a long-range 868/915 MHz system. Spektrum DSMX, FrSky and Flysky are common in ready-to-fly models and cars. Multi-protocol radios running EdgeTX can add modules, so one transmitter can fly many models.
The radio is the one part you keep as models come and go. Choose a protocol you can grow with.
Common protocols
| Protocol | Band | Typical use |
|---|---|---|
| ExpressLRS (ELRS) | 2.4 GHz or 900 MHz | FPV drones, wings, growing in cars |
| TBS Crossfire | 868/915 MHz | Long-range FPV |
| Spektrum DSMX | 2.4 GHz | Horizon Hobby RTR models |
| FrSky ACCST/ACCESS | 2.4 GHz | Aircraft, FPV |
| Flysky AFHDS | 2.4 GHz | Budget aircraft and cars |
| Brand-specific surface systems | 2.4 GHz | Ready-to-run RC cars |
Stick or wheel
Stick radios (two gimbals) fly aircraft and drones. Pistol-grip wheel radios drive cars and boats. Some surface radios use proprietary protocols tied to the car maker.
Modules and multi-protocol
Many stick radios accept external modules in a JR or nano bay, so you can add Crossfire or a multi-protocol module. Radios with an internal ELRS module plus a module bay cover most needs.
What to check
| Feature | Why |
|---|---|
| Protocol support | Matches your receivers |
| Model memory | Stores settings for many models |
| Telemetry | Shows battery voltage and signal |
| Gimbals | Hall-effect gimbals last longer |
| Firmware | EdgeTX or similar for flexibility |
| Battery | Rechargeable or AA |
Pair it with the right goggles from our FPV video guide. Browse radios.
Common questions
What is the best radio protocol for FPV?
ExpressLRS is the most popular for its low latency, long range and low-cost receivers. Crossfire is a proven long-range alternative.
Can I use any receiver with my transmitter?
Only receivers using the same protocol. A DSMX transmitter will not bind to an ExpressLRS receiver.
What is EdgeTX?
Open-source transmitter firmware used by many radios, including RadioMaster and Jumper models.
Do I need a pistol-grip radio for RC cars?
Pistol-grip (wheel) radios are standard for cars. Stick radios are for aircraft and drones.