A home that can detect is good. One that can defend itself is something else entirely.
House, flat, second home: this page is here to give you honest answers. Does this sound shield belong in your home? Where should it go? What is it like to live with?
“I attended night-time call-outs to homes as a police officer: by the time you arrive, it is all over. What I wanted back then was a device that would make the intruder leave in the very first minute. That is exactly what we have built.” Cédric Fontaine, founder of Lima Groupe
An award-winning French innovation: Audience Award, La Nuit de la Sécurité Globale (Républik Group). Figures and facts verified in September 2026.
We would rather start with facts than promises. Here is what the Ministry of the Interior and the daily press record about home intrusions, with their sources: this is the reality against which any protection device should be judged.
220,000 residential burglaries are recorded every year in France.Ministry of the Interior
Behind this figure, four facts that explain how a break-in unfolds better than any sales pitch could.
These figures describe averages, and nobody is frightened by an average. The cases below, on the other hand, are real, recent, and happened to ordinary people.
Held captive, beaten and slashed for two hours in his own home. The assailants were after 6 million in crypto: they left with €3,000.
Europe 1 / Journal du Coin, August 2026 (Jouy-en-Josas)A retired couple aged 77 and 78 tied up in their home in the middle of the night during a home invasion.
CNEWS, September 2025 (Vaucresson)A tobacconist and his family held captive in their home for hours, with a 2-year-old child present.
franceinfo (Seine-Saint-Denis)More than a hundred home invasions in one year around Nantes, more than double the previous year: the police warn of “a rapidly growing phenomenon”.
ICI / France Bleu, 2025A family with two young children held captive in their home for cryptocurrency... that they do not own.
ICI / France Bleu (Somme)Offences against persons keep rising, year after year.
Ministry of the Interior (SSMSI), 2025 reportWhat these cases have in common: ordinary people, at home, and violence out of all proportion to the sums at stake.
Alarms, cameras, remote monitoring: these are passive solutions. Their job is to detect and alert, and they do it well. An active solution, on the other hand, protects: it acts on the intruder, during the intrusion. Yet almost every equipped household has only passive protection: during the minutes that count, the rest plays out between the intruder and you.
You know this scenario; it is what brought you to this page. The alarm goes off, you know someone is downstairs. Go down? With what? Wait for the police? After a call to 17, the French police emergency number, they arrive in around a quarter of an hour on average, according to official indicators. The intruder, meanwhile, is a few metres away. You have an alarm, cameras, detectors, and at this precise moment all your equipment just watches.
With a LIMA SHIELD, the scene changes: as soon as the intrusion is confirmed, warning beeps sound, then the targeted room is saturated with a sound of 86 to 138 decibels, physically unbearable. The intruder has only one way left to go, the exit, and nobody had to go downstairs. Your home itself puts up the barrier between them and your family.
Let us answer frankly, because a purchase at this price is not made on impulse. There are households where LIMA SHIELD truly makes a difference, and others where it is not the priority right now. Here are both cases.
If in doubt, a demonstration settles it quickly: an expert looks at your layout, your entrances and your sensitive rooms, and tells you whether it would genuinely help. It is free, and sometimes the answer is no.
You do not protect a house by the square metre; you protect the routes intruders must take and the rooms where valuables are kept. One unit covers up to 100 m², on its free-standing base or mounted on the wall, pointed at the area to defend. Mounting it high improves sound coverage, but it is not essential. The locations our private customers choose most often:
Large house, several levels, outbuildings? Several Shields are paired in the mobile app, Lima Shield Connect: each unit communicates with the others, and you control them together or separately, room by room, from the same screen.
1. Disarmed: the house carries on as normal, the device is idle. 2. Armed: it monitors. If an intrusion is confirmed: warning beeps, a time delay, then emission. 3. Triggered: emission is in progress, the sound alternating with pauses, can be switched off at any time by code, badge or app.
And one shortcut changes everything: the panic button, the remote control and the app trigger the Shield even when it is not armed. If you are assaulted in broad daylight with the door open, one press is enough. The keypad completes the set-up at the entrance, like a conventional alarm.
It is the question every family asks: will a device like this weigh on daily life? The answer is a single word, no, and here is why, step by step.
In short: you arm it in the evening like an alarm, forget about it the rest of the time, and only really think about it on the day it is needed.
It is not a choice between what you already have and LIMA SHIELD. You keep your alarm, your cameras, your contract: LIMA SHIELD adds the active layer on top of all that. It is AND, not OR.
In other words, there is no decision to undo. Your installation stays in place and keeps its role; LIMA SHIELD adds the one that was missing.
A French sound shield, winner of the Audience Award at the Nuit de la Sécurité Globale (Républik Group). When an intrusion is confirmed, it warns the intruder with a sequence of beeps, then emits a sound of 86 to 138 decibels, calibrated to the 2 to 5 kHz band, where human hearing is most sensitive, and modulated to prevent any habituation. The area becomes unbearable and triggers the reflex to flee. Without contact, without substances, without confrontation.
Behind the unit: a French startup, co-founders from the army and the police, engineers, some of them formerly at Dassault, nearly €1 million in research and development, prototypes built in Strasbourg, and compliance with European CE standards.
“Designed as an alternative to conventional alarm systems or close protection, it works without a subscription and aims to prevent burglaries, assaults or attempted kidnappings.” Le Figaro, July 2026
Private individuals, as well as jewellers, tobacconists, town halls and police stations are among the first customers and pre-orders.
An alarm rings, a camera records: these devices run continuously, with no consequences for anyone. LIMA SHIELD does not work that way. It stays on standby and only acts on a confirmed intrusion: it is a professional instrument, drawn from research originally developed for institutional use, then designed and regulated for civilian use.
Think of it as the device that takes over once the alarm has done its job: it only acts on a confirmed intrusion, and every activation is regulated from start to finish: warning beeps, time delay, automatic shut-off. You stay in control at every stage, by code, badge, app or remote control. It is the one you are glad to have on the day everything else has been breached.
| Solution | Type | During the intrusion | In practice? |
|---|---|---|---|
| Conventional alarm | Passive: detects and alerts | The siren sounds | Not much happens: noise, then waiting. |
| Cameras | Passive: sees and records | Records the scene | You get the information. Nothing more. |
| Remote monitoring | Passive: alerts and dispatches a response | Delayed response | Decent, but response times are still long. |
| Security fog | Active: conceals property | Fills the space with fog | Effective once. Open a window and it is gone. |
| Strobe light | Active: visual disruption | Flashes of light | A real impact, but highly variable. |
| Security guarding | Active: human presence | Depends on where the patrol is | Very effective, but expensive. |
| LIMA SHIELD | Active: makes intruders flee | Warning, then sound saturation | Very effective, and inexpensive. |
Ultimately, the best security set-ups are combinations: detection, footage, a response team... and something that actually acts. LIMA SHIELD is the missing piece in your set-up.
Let us do the full calculation. Depending on the extent of the loss, the total cost of a burglary can range from around €2,000 to €95,000: stolen goods, damage, repairs, the insurance excess and any consequences for your policy. On top of that come the paperwork, and sometimes long discussions with the insurer to get compensation.
Then there is what no invoice covers: sleep that takes a long time to return, children who no longer want to sleep alone, that room you never walk through quite the same way again. It is not just belongings you lose: it is the peace of mind of being at home.
Set against that, LIMA SHIELD costs €2,500 excl. VAT, once, with no subscription: where remote monitoring is paid every month, this you buy once and own. It is the price of a professional instrument: nearly €1 million in research and development, a French technology. Spread over its 10-year lifespan: roughly 68 cents a day. And we carry the long-term risk: 2-year manufacturer's warranty, battery excluded.
Manufacturer's warranty: 2 years. For 2 years, if your LIMA SHIELD develops a defect or a fault, we repair or replace it. Only the battery, a wear part, is excluded. Simply contact our support: a team based in France diagnoses the issue with you and arranges the repair or replacement. Beyond these 2 years, the device is designed to last 10 years.
LIMA SHIELD is set up in 5 to 10 minutes, on its own or connected to your alarm. It is produced in limited runs and is regularly out of stock.
Order LIMA SHIELDcheck availability Request a demonstrationwith a security expertEvery stage of the device is built to prevent that. The sensors are designed to recognise toddlers and pets. No sensor is infallible, which is precisely why protection does not rely on it alone: warning beeps and a 10-second time delay precede any emission, and disarming is a code, a badge or a phone away. With brief exposure at a normal distance, the effects are temporary: discomfort, a ringing in the ears that fades within minutes. The emission stops on its own at the end of the set duration.
That is exactly the scenario it exists for: the device is pointed at the intruder's path, not at the bedrooms. You stay where you are, the saturated zone is the one the intruder crosses, and the only comfortable way for them to go is out.
The sound waves do not pass through walls: tests show that the noise stays contained within the protected zone. From outside, the neighbours hear at most the equivalent of an alarm siren slightly more powerful than average.
No. Detection and triggering are local: they do not depend on any network. Wi-Fi is there for convenience (notifications, remote control), and the built-in 4G takes over if there is none or if your router goes down. A cellar, a garage or a second home with no internet connection is protected exactly like your living room.
The internal battery takes over automatically: up to 1 month on standby, with several deterrence cycles in reserve, and up to 3 months with the optional secondary batteries. A power cut, accidental or deliberate, does not disarm the device, and you are notified in the app.
This is one of its specialities: the device is portable and can move with you from season to season, from one home to another, and the app shows you the system status wherever you are. Arming is done remotely, with a single tap.
Yes. For indoor use, no French law known to date caps the power of an acoustic deterrent device, and LIMA SHIELD falls into a category distinct from sirens. CE compliant, its activation in the event of an intrusion falls within the legitimate defence of property (article 122-5 of the Code pénal, the French Criminal Code), with warning, time delay and automatic shut-off.
No: two screws for the wall bracket, a power socket, and setup is done via Bluetooth from the app. Allow 5 to 10 minutes. If you prefer assisted installation, request a demonstration: an expert plans the layout with you.