D27 Voice recorder jammer with 21 ultrasonic emitters, remote control, and voice control

This compact and portable ultrasonic anti-recording device is designed to protect private conversations by generating precisely modulated ultrasonic waves through 21 independent emitters. These ultrasonic signals effectively disrupt microphones and audio recording equipment, including smartphones, voice recorders, and hidden listening devices, making them unable to capture clear sound within the protected area.

With an effective working radius of approximately 2 to 6 meters, the D27 audio jammer creates a reliable privacy zone for meetings, personal conversations, vehicle interiors, and office environments. The device can be operated directly via physical buttons, controlled remotely with the included remote control, or activated using voice commands for added convenience.

In addition to its primary function, the ultrasonic emission can also serve as a deterrent against persistent animals or insects, offering multifunctional use in various environments.

The D27 is a highly cost-effective voice recording interference device.
With an effective range of up to 6 meters, it offers an uncommon level of coverage in the field of acoustic interference.

Designed to resemble a Bluetooth speaker, it maintains a discreet appearance.
It also features remote control capability, allowing convenient operation from a distance.

Safety & Operating Notes

The ultrasonic technology used is safe for the human body and suitable for everyday use.
When activated in a quiet environment, a faint operating sound may be audible within approximately half a meter of the device.

Two power modes are available:

• Low power mode – for small enclosed spaces such as car interiors
• High power mode – for larger areas like offices or meeting rooms
• The device defaults to high power mode upon startup

A built-in battery protection system automatically powers off the unit when the battery level drops below 20%, helping to extend battery lifespan.

Product Specifications

Ultrasonic Emitters: 21 high-efficiency emitters

Effective Coverage Range: approx. 2–6 meters

Emission Angle: up to 270° wide-area coverage

Interference Strength: up to 120 dB

Control Methods: onboard buttons, remote control, and voice command support

Remote Control Distance: up to 30 meters

Power Supply: built-in 2600 mAh lithium battery (9V)

Operating Time: up to 3.5 hours on a full charge

Dimensions: 195 × 81 × 48 mm

Charging & Remote Control Instructions:

Please use only the original 9V charger. Charging with 5V or 12V adapters is not supported and may damage the device.

The D27 can operate while charging.

Remote control activation becomes available approximately 2 seconds after manually powering on the device.

To switch between standby and active mode, use the power button accordingly after startup.