The first ultrasonic acoustic wave anti-recording guard that emits low frequency ultrasound wave that interferes with all microphone on media devices. This includes smartphone, tablet, digital recorder, bugging device, phone bug, wireless listening device, hidden camera. In fact it eliminates anything with a microphone that monitors, records or transmits sound.

Simply place where sensitive or private conversation is to take place and switch on anti-recording guard. It emits acoustic wave that overrides any microphones nearby.

The distance covered is 6 square metres over 360º coverage. No voice/conversation or sound can be heard on any microphones when in use and human ear only hears a mild hum when within 30-100cm.

The principle of the anti recording guard is to emit ultrasound acoustic waves that interfere's with the normal function of microphones. Its core technology is an advanced algorithm and chip which generate and run ultrasonic sound waves targeting the transmission frequency of sound media. Resulting in 4 models of military grade ultrasonic generator anti-recording shield.

1. Anti-recording device / anti-eavesdropping device.
2. Easy to use: 5 output directions, two gears, shielding angle 360 degrees.
3. Working principle: Ultrasound acoustic wave interference
4. Application: meeting, Business interview, Personal communication, Confidential / private conversation.
5. Function: protect your privacy and prevent eavesdropping.  Prevent phone voice recorder/ prevent digtal voice recorder/ prevent camera's voice or sound recorder.

Model F11 is designed to place in room where smartphone / tablet / suspect hidden recorder / listening device / hidden camera. It has 6 square metre range with 360º coverage and perfect to stop any suspect recording or sound monitoring. It has built in battery or can be powered on AC mains. Battery working time is 480-540 minutes (8-9 hours).