Recording apps for smartphones on the table, a voice recorder hidden nearby, or a professional microphone placed across the room — recording devices rarely stay in one fixed position.
Rather than focusing ultrasonic output in a single direction, the AUD-88 ultrasonic audio recording jammer uses its 88 built-in ultrasonic transducers to create a surround-sound interference zone.
The omnidirectional emission structure helps distribute ultrasonic signals over a wider area. This high-density layout increases the number of output points around the device, helping to minimize weak spots where microphones might still pick up sound, and providing 360° coverage with an effective range of up to 8 meters.
The anti listening device utilizes sine-wave ultrasonic technology to generate high-frequency interference, creating a stable ultrasonic environment that helps disrupt microphone recording capabilities while remaining unobtrusive during normal conversation.
Applications include:
- Conference rooms
- Private offices
- Business negotiations
- Interview rooms
- Confidential discussions
The microphone signal blocker combines powerful ultrasonic output with a rechargeable portable design. The built-in 2600mAh (18.5V) battery provides approximately 2.5 hours of working time, with a charging time of around 3 hours.
The device supports AC 100V–240V charging input and DC 21V / 1000mA output. Multiple strip-shaped ventilation openings around the top housing improve airflow and help maintain stable operation during extended use.
