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Keep your conversations private. Stay connected. Keep your conversations private. Stay connected.

Stop phone recordings without blocking any signals.

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Trusted by teams who take private conversations seriously.

Synermont
Aramco
DAMAC
Vera
Paugger
Graf Patsch Freisinger
Baka

The old choice was simple: stay reachable or stay protected.

Until now, people who wanted privacy often had to turn their phones off, leave them outside the room or collect devices before important conversations.

That may reduce recording risk, but it creates a new problem: you become unreachable. Guardian removes that trade-off.

Introducing Guardian: Privacy without going offline

Watch the film

How it works.

Place your phone on Guardian to stop recordings. Stay fully reachable.

  1. 1

    Place your phone

    Set your phone on Guardian.

    Phone being placed on Guardian Ultrasonic
  2. 2

    Auto-detect

    Detects your phone and turns on.

    Phone resting on Guardian Ultrasonic
  3. 3

    Enjoy your privacy

    Your conversations stay private.

    Private conversation protected by Guardian Ultrasonic

Trusted by offices and meeting rooms in 41+ countries.

🇪🇺 🇺🇸 🇦🇪 🇸🇦 🇧🇷 🇬🇧 🇸🇬 🇴🇲 🇶🇦 🇨🇦 🇻🇮 🇻🇳
Completely offline
No Wi‑Fi, Bluetooth, or internet connection. Guardian is intentionally offline.
No configuration
Ready to use out of the box.
Zero setup.
Designed in Austria
Software and hardware designed in-house.

Hear Guardian in action

See how Guardian Ultrasonic blocks phone recordings in a real-world side-by-side test.

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Order your Guardian.

A one-time purchase — no subscription. Free worldwide shipping, backed by 14-day returns and a secure checkout.

Free worldwide shipping
Limited time
10% discount
2+ units

Quantity

Discounts update automatically

1 × Guardian Ultrasonic
$649.00
Total $649.00
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Free shipping 14-day returns 1 year warranty Ships in 24h No subscription No setup
5.0

People enjoying their privacy.

5.0

People enjoying their privacy.

Beautiful and simple product, without any apps or setup process. We switch it on when we need it and thats it.
🇦🇪 jaouad taha
We bought Guardian because we got annoyed having to leave our phones outside during meetings. We are very happy with the product.
🇦🇪 Francesco M.
Great and simple product. Clients often ask about it, making it a great conversation starter.
🇸🇦 Mohamed T.

Made in Europe

Hardware and software are fully designed by us in Austria.

Every component is designed and engineered by our team in Austria — from the circuit board to the firmware.

No outsourced modules, no third-party software. Full control over every layer means no hidden backdoors and no compromises on quality.

Technical Specs

FAQ

Can I still receive calls and messages? + −
Yes. Guardian does not block your mobile signal, Wi-Fi or Bluetooth. Your phone remains fully connected. Lift it off Guardian when you want to use its microphone for a call or recording.
Is Guardian Ultrasonic a jammer? + −
No, not in the traditional sense. It doesn't block radio signals like mobile data, Wi-Fi, or Bluetooth. Guardian Ultrasonic uses ultrasonic acoustic waves (high-frequency sound) to physically interfere with microphones.
Does it block all microphones in the room? + −
Guardian Ultrasonic is designed to protect you from your devices recording your private conversations. It does not cover the whole room. (Be careful with products claiming to do so — they are usually misleading.)
Does it work with phone cases? + −
Yes, it works with most phone cases. Certain phone cases with a subpar build quality can sometimes block the microphone slightly. In those situations simply place the phone on the device without a case.
Does it require an app or setup process? + −
No, Guardian does not require any apps or setup ceremony. In fact, it has no internet access and requires no software updates. It just works.

Order with confidence.

Fast shipping
Ship out within 24h
Free 14-day return
No reason needed. Free return shipping & full refund.
One-year warranty
Warranty period subject to local laws

Guardian Ultrasonic

Enjoy your privacy.

Order now