The camera sees. LIMA SHIELD acts.
Your cameras are irreplaceable: they see, they record, they provide evidence. But during the intrusion itself, they just watch. This page compares the two roles, and shows why sites with video are precisely the ones that lack a way to act.
“I was a municipal police officer. We used the footage after the event. During the event itself, there was nobody in the room to make the intruder leave. That is the gap we set out to fill.” Cédric Fontaine, founder of Lima Groupe
Comparison checked in September 2026.
The sites best equipped with video are often those where the sense of helplessness is strongest. It is a paradox our customers almost always describe in the same terms.
What they have in common: the camera documents the intrusion, but does not interrupt it. What is missing is something to interrupt it.
As soon as an intrusion is confirmed: warning beeps, then sound saturation at 86 to 138 decibels. The area becomes unbearable and triggers a flight reflex. The intrusion is cut short while your cameras keep filming.
Sound does not need to see a face. Covering your ears is not enough: the acoustic pressure is felt in the skull and the chest, disorienting the intruder and depriving them of any useful perception.
Detection by infrared and thermal analysis: it perceives heat and movement, never faces. No images captured, GDPR and CNIL compliant: it protects the rooms where a camera is impossible or unwelcome.
The two roles in brief, before the details. Documenting what happened and interrupting what is happening are two different jobs, and no tool does both well.
The comparison covers what happens once someone is inside. That is the only window that truly matters, and it is where the two technologies part ways.
| Cameras | LIMA SHIELD | |
|---|---|---|
| During the intrusion | Record the scene. | Renders the area unbearable and makes the intruder flee. |
| After the intrusion | Provide footage for the investigation and the insurer. | Intrusion cut short: less loss to claim for. |
| Against a prepared intruder | Balaclava and gloves: the footage loses its value for identification. | Sound ignores the balaclava; covering your ears is not enough. |
| Deterrence | Known and factored in by experienced intruders. | A modulated, unpredictable signal you cannot get used to. |
| Privacy | You are filmed at home, footage stored. | Zero cameras: no images captured, GDPR and CNIL compliant. |
| Both together | LIMA SHIELD acts without concealing anything: video surveillance remains fully usable throughout the incident. | |
Your cameras are not the problem, and there is no question of replacing them. The question is whether your installation needs something that intervenes, and in which cases.
For a site already equipped with video, the answer is the two together: the camera sees and records the evidence, LIMA SHIELD interrupts. Each does the job the other cannot.
The camera works for tomorrow's investigation. LIMA SHIELD works on the minutes unfolding now: warning, saturation, flight. Every minute shaved off an intrusion means less loss to claim for.
Intruders have adapted to video surveillance: face covered, gloves, quick movements. The LIMA SHIELD sound does not need to recognise anyone: it makes the area physically unbearable, for anyone.
Changing rooms, staff areas, living quarters: cameras are prohibited or unwelcome there. LIMA SHIELD protects them without capturing a single image: infrared and thermal analysis, GDPR and CNIL compliant.
Unlike security fog, which blinds the video at the decisive moment, sound takes nothing away from the image: the recording of the incident remains usable for the police and the insurer. And via the app, video verification comes before triggering: you check, then you decide.
LIMA SHIELD is a French sound shield, winner of the Audience Award at the Nuit de la Sécurité Globale (Républik Group): built-in detection or connected to your installation, warning beeps, then a sound of 86 to 138 decibels calibrated to the 2 to 5 kHz band where human hearing is most sensitive. Without contact, without any substance, without confrontation.
Behind the unit: a French startup, co-founders from the army and the police, engineers from the defence and acoustics sectors, some of them formerly at Dassault, nearly €1 million in research and development, prototypes built in Strasbourg, and compliance with European CE standards.
“A breakthrough innovation in security.” Le Figaro, July 2026
Jewellers, car dealerships, warehouses, town halls and police stations already feature among our first customers and pre-orders.
A LIMA SHIELD costs €2,500 excl. VAT, once, with no subscription or cloud storage: around 68 cents a day over its 10-year lifespan, against the total cost of a burglary, from around €2,000 to €95,000 depending on the extent of the loss. And we carry the long-term risk: 2-year manufacturer's warranty, battery excluded.
Yes. Connected to your alarm system via dry contact or radio relay, it uses the detection of your existing installation. On its own, it relies on its own infrared and thermal sensors. Either way, video verification remains available in the app before triggering.
You keep full control: automatic triggering after warning and a 10-second delay, or manual triggering from the app, the panic button or the keypad. And deactivation is always just a code, a badge or a phone away.
No. Remote monitoring raises the alarm and sends people out; LIMA SHIELD acts on site in the minutes before anyone is there. The two levels of protection complement each other, and LIMA SHIELD works without a subscription.
Yes. For indoor use, no French law or regulation known to date caps the power of an acoustic deterrent device, and LIMA SHIELD belongs to a category distinct from sirens. It is CE compliant, and in the event of an intrusion its use falls within the lawful defence of property (article 122-5 of the French Code pénal), with warning, delay and automatic shut-off.
During emission, the audio of your recordings is saturated, but the image remains fully usable: this is precisely one of the advantages of sound over fog, which hides everything. The emission duration is set in the app, with automatic shut-off.
LIMA SHIELD integrates with your existing installation or works on its own. It is produced in limited runs, and is regularly out of stock.
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