Effective protection against eavesdropping using mobile phones

The ASU 2.0 is a unique speech protector designed as an acoustic safe for multiple mobile phones. Its key advantage is that it does not block calls, SMS, or other network communications.

Once the first phone is placed into the stand, it automatically generates ultrasonic noise that overwhelms the microphones of any mobile phones within range. This makes it impossible to record a conversation effectively.

• Produces ultrasonic noise inaudible to the human hearing, ensuring no disruption to your meetings.
• Compatible with most mobile phones.
• Discreet design – resembles an ordinary phone stand.

Ultrasound Generator

The ASU 2.0 provides powerful protection against eavesdropping via microphones in mobile phones, dictaphones, and other smart devices. Ultrasonic noise is the most effective defense against eavesdropping, as it overwhelms the microphones, rendering all recorded sound unusable.

Easy to Use

The ASU 2.0 is fully independent and easy to operate. Simply place the stand where participants can place their phones, plug it in. Then, insert the phone into the ASU 2.0; the stand will glow with blue backlighting, indicating that the device is fully operational. The device activates automatically when a phone is inserted — no setup is required. The stand is designed for four mobile phones.