What does “licence-free” actually mean?
Licence-free means the service is exempt from individual licensing, not that there are no rules. The regulator has decided that a certain band, power level and equipment type can be used without a licence because the interference risk is low and the equipment is controlled.
The limits usually cover:
- Frequency — a fixed slice of spectrum, often shared by everyone in the area.
- Power — typically 0.5 W to 2 W, sometimes expressed as ERP or EIRP.
- Antenna — often fixed or handheld only; external antennas and amplifiers are usually prohibited.
- Channels — a defined channel list, sometimes with restrictions on data or repeaters.
- Equipment — the radio must be approved for that service and market.
If any of those limits is exceeded, the radio is no longer operating under the licence-free exemption. That is why a “16-channel” handheld and a “16-channel” handheld with a rooftop antenna are not the same legal product.
PMR446: the European default
PMR446 is the harmonised European licence-free service. It uses 446.0–446.2 MHz, a maximum of 0.5 W ERP, handheld equipment and a defined channel plan. It is the band behind most European hotel, retail and event handhelds.
What PMR446 is good at:
- short-range coordination in a single building or open venue;
- low-cost handhelds with long battery life;
- cross-border use within the countries that implement the PMR446 decision;
- simple deployment with no application, no frequency plan and no renewal.
What it cannot do:
- legally use a repeater or a rooftop antenna in most countries;
- cover a deep basement or a large metal warehouse reliably;
- keep conversations private from other PMR446 users nearby;
- support dispatch recording, man-down or alarm integration as a system feature.
For a single restaurant, a small shop or a temporary event, PMR446 is often enough. For a 200-room hotel with a basement, it is usually the start of a problem.
FRS: the US family and small-team band
FRS (Family Radio Service) is the US licence-free UHF service. It uses the 462/467 MHz band, allows up to 2 W, provides 22 channels and is intended for handheld use. It is widely used by families, small retail teams, site crews and event staff.
FRS is a practical choice when:
- the team is small and works in one open area;
- the users are close enough for handheld-to-handheld coverage;
- the radios are bought as approved FRS units with fixed antennas;
- no repeater, dispatch or recording is required.
The licensed step up is GMRS, which uses the same general band but allows higher power, detachable antennas and repeater use under an FCC licence. GMRS is still a shared service and is not a substitute for a coordinated business channel on a large industrial site. See the walkie-talkie licence guide for the boundary between FRS and GMRS.
MURS: the US business VHF option
MURS (Multi-Use Radio Service) is a US licence-free VHF service with five channels around 151–154 MHz and a 2 W limit. Unlike FRS, MURS explicitly permits business use, which makes it attractive to small contractors, farms, marinas and site teams that prefer VHF.
MURS advantages:
- VHF propagates better over open ground, water and light vegetation than UHF;
- no individual licence and no frequency application;
- business use is allowed;
- simple handhelds and base stations are available.
MURS limitations:
- only five channels, shared with other users;
- 2 W maximum, so coverage is still site-limited;
- no repeater or external antenna under the ordinary rules;
- not a solution for a dense urban building or a multi-floor site.
Why licence-free radios fail in hotels and warehouses
The failure is predictable because the limits are physical. A 0.5 W or 2 W handheld with a short antenna has a small link budget. Concrete, steel, racking, lifts and basement walls absorb or reflect most of it. The result is a radio that works in the lobby and fails in the service corridor.
In a hotel, the problem areas are the ones guests never see: basements, plant rooms, stair cores, service corridors and car parks. In a warehouse, racking and containers create dead spots that a coverage map will not show. A licence-free handheld cannot be connected to the indoor antenna system or repeater that would fix those areas.
The practical consequence is that licence-free radios are often used for the first month and then replaced. If the site has any of the following, plan a licensed system from the start:
- more than one floor of concrete construction;
- a basement or plant room;
- racking, containers or steel cladding;
- more than four talk groups;
- a requirement for private or recorded traffic.
For the scenario-specific version, see hotel two-way radios and warehouse communications.
Can you use a licence-free radio with a repeater?
In most countries, no. The licence-free exemption is written around low-power handheld equipment. Adding a repeater, an external antenna or an amplifier changes the effective radiated power and the interference profile, which takes the installation outside the exemption.
There are narrow exceptions in some markets, and some digital PMR446 products offer limited repeater-like features, but they are not a general solution. If a repeater is part of the requirement, the project should be designed as a licensed business system with a frequency assignment, a duplex pair and a proper site survey.
A repeater is not a magic coverage extender either. It helps when it is on a high antenna and the handheld can reach it. If the handheld cannot reach the repeater from the basement, the repeater does not solve the basement.
What are the limits on power, antenna and accessories?
The exact limits depend on the service and the country, but the pattern is consistent:
| Service | Band | Maximum power | Antenna | Repeater | Licence |
|---|---|---|---|---|---|
| PMR446 | 446.0–446.2 MHz | 0.5 W ERP | Handheld, fixed | Generally not permitted | None |
| FRS | 462/467 MHz | 2 W | Fixed, handheld | Not permitted | None |
| MURS | 151–154 MHz | 2 W | Fixed, handheld | Not permitted | None |
| GMRS | 462/467 MHz | Up to 50 W | Detachable allowed | Permitted with licence | FCC licence |
Accessories matter too. A high-gain antenna, a vehicle amplifier or a “long-range” adapter can take a compliant radio outside its approval. If you need more range, the right answer is usually a better network — a repeater, an indoor antenna system or a different technology — not a bigger antenna on a licence-free handheld.
When should you move to a licensed system?
Move when the radio becomes part of the operation rather than a convenience. The usual triggers are:
- coverage requirements that include basements, stairwells, car parks or multiple buildings;
- a need for separate talk groups by department or post;
- encryption, recording, dispatch or emergency alarm features;
- a requirement to integrate with fire alarms, CCTV or a telephone system;
- a site that is growing and cannot be redesigned every year.
The licensed route is not only about power. It gives you a frequency assignment you can plan around, a repeater pair you can licence, and a documented system that can be handed over, audited and expanded.
If you are at that point, read the business radio licence guide for the application and renewal process, and the walkie-talkie range guide for the coverage side. If you want to test whether a licence-free radio could still work, the coverage planner gives a first-pass answer in about five minutes.