VTX Power Compliance Explained: FCC vs CE Rules for FPV Video Transmitters

Of all the parts we manufacture and ship, video transmitters are the only category where the most common buyer question isn't "how much does it cost" — it's "will this get my shipment stopped at customs?" That's a fair question. VTX output power is regulated radio spectrum use, the rules differ sharply between the US and Europe, and a configuration that's routine in Texas can be illegal in Germany. This article lays out what the rules actually say, how we configure units for different markets, and what B2B buyers should specify before placing an OEM order.

Why VTX power is a legal question, not a spec question

A 5.8GHz video transmitter is a radio transmitter. Unlike motors or flight controllers, it emits in spectrum that governments license and enforce. Every VTX on the market — 25mW to 1.6W — is capable of transmitting far above what most jurisdictions allow without a license. The hardware is usually compliant-capable; the configuration determines legality. This is the point most importers miss: the same physical unit can be a legal product or a contraband product depending on which power table is loaded in firmware and what the listing claims.

For a distributor, the risk chain runs: factory ships 500 units configured for high power → your marketplace listing advertises 800mW → a regulator or platform compliance team checks → listing takedown, customs seizure, or in the EU, a product-safety claim against you as the importer of record. In the EU, the importer carries product compliance liability. That makes VTX configuration a purchasing decision, not a firmware footnote.

FCC rules (United States): 25mW unlicensed, more with a ham license

In the US, the relevant framework is split:

• FCC Part 15 covers unlicensed devices in the 5725–5875 MHz band. Practical output under Part 15.249 corresponds to roughly 25mW–50mW class operation for typical FPV antennas — this is what a US pilot without a license may legally run.
• FCC Part 97 (amateur radio) covers licensed operators. The 5.8GHz ham band allocation (5650–5925 MHz) permits far higher power, which is why US race and freestyle pilots routinely run 400mW–1W VTXs. The entry-level Technician license is inexpensive, exam-based, and common in the FPV community.

Net result for a US-market distributor: selling higher-power VTXs is normal and largely tolerated for hobby use, but your product documentation should note that extended power levels require an amateur license. Products are typically configured with race-band frequencies and unlocked power tables, and the market expects 400mW–1W options on 5" freestyle quads. Our Pulse 5806 ships to US B2B customers with the standard unlocked configuration unless asked otherwise.

CE rules (Europe): 25mW, and it's a hard cap

Europe is different in kind, not just degree. Under CE radio equipment rules (following ERC Recommendation 70-03 for the 5725–5875 MHz band), the maximum permitted output for unlicensed use is 25mW. Not "recommended" — it's the ceiling, and operating above it without an amateur license is illegal in most member states.

Enforcement varies widely. Germany, Austria and the Nordic countries are strict — inspections at FPV events and marketplace compliance checks happen, and equipment running above 25mW can be confiscated. France, Poland and others are lighter-touch in practice but the law is the same. For a B2B buyer the practical consequence: an EU-bound order should be configured and documented as a 25mW product, regardless of what the hardware can do.

Some EU pilots hold amateur licenses and run more, and digital systems like Walksnail and DJI operate under their own regional certifications — but for analog 5.8GHz VTXs sold at retail in the EU, 25mW is the spec you put on the box.

How factories handle this: power tables, firmware locks and labeling

This is where OEM work matters. The steps we take on region-configured orders:

1. Region-specific VTX tables. Firmware tables for EU-bound orders cap selectable power at 25mW. The higher steps are removed in firmware, not just "not recommended" in the manual — a driver can't accidentally flip to 800mW.
2. Bench verification of the shipped configuration. Every unit is power-swept on the RF bench (as described in our QC article), and for EU-configured batches we verify the table itself: the 25mW setting must measure within tolerance, and no menu path can select anything higher.
3. Labeling and documentation. CE-configured units carry CE marking with the DoC referenced, and packaging states the maximum power. US-configured units include the amateur-license note. Mixed-market orders are packed and labeled per carton to avoid a 25mW box ending up on an EU shelf.
4. Freight routing. Radio gear draws attention in customs more than passive parts. Correct declared descriptions (video transmitter, 25mW, 5.8GHz, CE) reduce inspection friction; a declared "1.6W VTX" into the EU invites it.

What B2B buyers should specify — a pre-order checklist

• Target market and configuration: EU (25mW locked), US (unlocked + license note), or split shipment with per-region configuration. Tell the factory in the RFQ, not after production.
• Measured, not claimed, power: ask for bench sweep data per batch, with test antenna and conditions stated. A "25mW" VTX measuring 60mW is your compliance problem, not the factory's — unless you have the data in writing.
• Documentation package: DoC/CE file for EU orders, FCC conformity statement for the US, and packaging that matches the configuration.
• Listing copy review: your marketplace text should match the shipped configuration. Advertising 800mW on a 25mW-locked unit confuses customers; advertising 800mW on an EU-bound unit creates liability.
• Frequency tables: confirm race band coverage for your market's events, and for digital systems confirm the regional firmware variant.

Frequently asked

Bottom line

VTX compliance isn't complicated, but it does require deciding before production, not after. Know your market's rules, get the configuration in firmware and in writing, and demand measured power data with the shipment. A factory that proactively asks "which market is this order for?" is doing its job; one that ships you 500 unlocked 1.6W units with no question asked is handing you their risk.