Yes. The CVC's 5 dBi antenna uses a strong neodymium magnet and is rated to hold at 70 mph (113 km/h) on a steel roof. For motorway driving, position it dead-centre on the roof away from roof rails and aerials. Give the magnet a firm press down before setting off. Note: it will not magnetically grip aluminium, carbon-fibre or fibreglass / GRP panels — on those roofs use the included adhesive pad or a screw-on bracket.

The CVC ships with a 12V cigarette-lighter adapter designed for driving. If your static caravan stays on a park all year, you will need the optional 240V AC adapter to run the booster from the mains hook-up. The booster itself is identical; only the power supply changes. On touring trips, just plug into the car or motorhome 12V socket as normal.

The magnetic base will not adhere to a non-ferrous fibreglass or aluminium roof. Use the self-adhesive mounting pad (included) or a permanent screw bracket (available as an accessory). Position it as high and central as possible on the roof, away from air-conditioning units and solar panels, for the clearest line to the nearest cell mast.

You need at least 1 bar (a usable sliver) of Band 20 4G at the point where the roof antenna sits. The booster amplifies that weak donor signal to a full-strength signal inside the cabin. If your phone shows zero bars and runs emergency-only outside, no Ofcom-legal booster in this price range will create signal from nothing — test your roof position in field mode first.

The CVC boosts Band 20 (800 MHz FDD LTE), which is 4G. It does not boost 3.4 GHz 5G (Band n78). The upside is that Band 20 is the UK's longest-range 4G band — it travels furthest from masts and penetrates rural areas best, which is why it is the right choice for countryside driving, remote aires and static caravan parks. VoLTE is supported, so calls stay crystal clear over the boosted 4G.

Yes. The CVC boosts the physical Band 20 radio signal, not any specific SIM or contract. Every MVNO that rides on EE, O2, Vodafone or Three works — that includes giffgaff (O2), Tesco Mobile (O2), Lebara (Vodafone), Lycamobile (EE), Plusnet (EE), ASDA Mobile (Vodafone), SMARTY (Three), iD Mobile (Three), BT Mobile (EE) and Vectone Mobile (EE). Just insert your existing SIM as normal.

The CVC has no per-device limit — it advertises "unlimited simultaneous users". In practice that means every phone, tablet, laptop dongle and sat-nav inside a 100 m² cabin or caravan gets a cleaner 4G signal at the same time. A family of four streaming, browsing and making VoLTE calls simultaneously will not tax the unit.

Yes. The CVC is Ofcom licence-exempt, UKCA and CE certified, and complies with UK mobile signal booster regulations. As long as it is used as supplied (65 dB max gain, 17 dBm max output, Band 20 only) on a vehicle or caravan, you do not need to notify Ofcom or pay for a licence. Do not modify the unit or swap antennas — that would void the compliance.

Two reasons. First, as you drive the handoff between cell masts happens continuously — during a handoff there can be a brief gap. Second, the CVC only boosts Band 20; if a particular mast serves your area on Band 3 (1800 MHz) or Band 7 (2600 MHz) only, the booster cannot help there either. In rural UK, Band 20 is almost always the longest-range band, so most drivers see a big improvement overall.

No — the CVC is a cellular signal booster, not a Wi-Fi router. It makes your phone's own 4G connection stronger. If you want a caravan Wi-Fi network, put your phone or a separate 4G dongle into Wi-Fi hotspot mode inside the boosted signal; the CVC will then improve the cellular connection feeding that hotspot. It does not create or rebroadcast Wi-Fi itself.