Quick Answer
FPV systems use different frequencies for different purposes. 5.8GHz is the most common frequency for analog video transmission, while 2.4GHz is used for radio control (ELRS, FrSky, FlySky). For long-range control, 868MHz (Crossfire) systems offer better penetration. Understanding which frequencies to use helps you avoid interference and fly legally in the UK.
FPV Frequency Bands
5.8GHz - Analog Video (Most Common)
The 5.8GHz band is the standard for analog FPV video transmission. It offers:
- 40 channels across 5 bands (A, B, E, F, R)
- Low latency (10-15ms)
- Good range for most flying (1-3km with standard gear)
- Works well in urban environments
- Small antennas, easy to mount on drones
Most FPV equipment uses 5.8GHz because it balances range, penetration, and antenna size well. Browse our VTX collection for 5.8GHz transmitters.
2.4GHz - Radio Control (Standard)
The 2.4GHz band is the most common for control links:
- ELRS, FrSky, FlySky, Spektrum protocols
- Good range (2-5km typical)
- Wide receiver selection
- Works with most radios including RadioMaster T8L
For most pilots, 2.4GHz control is sufficient. ELRS on 2.4GHz can achieve 10km+ range with good antennas.
868MHz / 915MHz - Long Range Control
For long-range flights where 2.4GHz isn't enough:
- Crossfire (868MHz EU, 915MHz US)
- ELRS long-range modes (both frequencies)
- Excellent penetration through trees and buildings
- Range of 10-20km+ possible
Important: Crossfire runs on 868MHz (EU) or 915MHz (US), NOT 2.4GHz. This is a common point of confusion. Crossfire offers significantly better range and penetration than 2.4GHz systems, but requires compatible receivers.
1.2GHz / 1.3GHz - Long Range Video
Lower frequency for video when you need maximum range:
- Better penetration through trees and buildings
- Longer range than 5.8GHz (5-10km possible)
- Requires larger antennas
- More restricted in UK (license may be required)
Most pilots don't need 1.2GHz video. 5.8GHz is sufficient for 95% of flying. Only consider 1.2GHz if you specifically need long-range video penetration.
Digital FPV Frequencies
Digital systems like DJI and Walksnail use multiple frequencies automatically:
| System | Frequencies | Behavior |
|---|---|---|
| DJI O3/O4 | 5.8GHz, 5.1GHz, 2.4GHz | Auto-switches for best signal |
| HDZero | 5.8GHz fixed | Like analog, single frequency |
| Walksnail | 5.8GHz fixed | Single frequency |
Digital systems handle frequency selection automatically. You don't need to manually pick channels like analog. For more on digital vs analog, see our analog vs digital comparison.
UK Legal Requirements
- 5.8GHz video: Legal up to 25mW without license
- Race bands: Up to 500mW permitted for racing events
- Higher power: Requires amateur radio license
- 1.2GHz: May require license depending on power output
For most hobby flying, 25mW-200mW on 5.8GHz is legal and sufficient. See our guide on UK FPV licensing for full details.
Channel Selection
To avoid interference with other pilots:
- Check which channels others are using before powering on
- Use channels spaced apart (e.g., F2, F4, F6, F8)
- At organised events, a frequency marshal will assign channels
- Never fly on the same channel as another pilot - causes video breakup for both
Most VTX have a "pit mode" or "0mW" setting - use this when setting up at the field to avoid interfering with others.
What Frequency Should You Use?
For beginners:
- Video: 5.8GHz (standard analog)
- Control: 2.4GHz ELRS (included with most starter kits)
For long range:
- Video: 5.8GHz with high-gain antenna, or 1.2GHz
- Control: 868MHz Crossfire or ELRS
For racing:
- Video: 5.8GHz race band (R1-R8)
- Control: 2.4GHz ELRS (fast enough, lighter than Crossfire)
FAQ
Q: What's the difference between 2.4GHz and 868MHz control?
A: 2.4GHz (ELRS, FrSky) is standard for most flying with 2-5km range. 868MHz (Crossfire) offers longer range (10-20km+) and better penetration through obstacles, but costs more and requires specific receivers.
Q: Which frequency gives the best range?
A: 1.2GHz video + 868MHz control gives maximum range, but 5.8GHz video + 2.4GHz control is sufficient for most pilots. Range is usually limited by video, not control.
Q: What if I get interference?
A: Change to a different channel on the same band. If that doesn't work, switch bands entirely (e.g., from Race band to FatShark band). Moving away from WiFi routers also helps.
Q: Can I use 2.4GHz for video?
A: No, 2.4GHz is for control only in FPV. 5.8GHz is the standard for analog video. Using 2.4GHz for video would interfere with your control link.