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Ultrasonic Audio Shielding System Voice Recording Jammer for VIP Protection EST-WS-4

SKU: #001 - In Stock

  • airport Shipping:  International shipping available
  • delivery_food Shipping time:   Standar(10-20 business days), Rush(5-10 business days)
  • chip Discount:  Get 2% discount on orders of USD $100.00,Get 3% discount on orders of USD $200.00
  • compass Handling time:  Ships within 3 business days after receiving cleared payment
  • available_updates Returns:  7 days money back guaratee,buyer pays return shipping

Product Detail

Customer Reviews

Shipping Guide

Delivery Time

Product Tags

1. System Characteristics:

1. Flexible use, two sets as a basic configuration, can flexibly increase the main unit according to the scene, to achieve better shielding effect.

2. Flexible operation, remote control can be used to open and close multiple sets of mainframes at the same time.

3. Flexible configuration, each jammer main unit can work independently, flexible layout, arbitrary placement, a key to start.

4. Flexible and portable, each jammer main unit is equipped with batteries, easy to carry and use.

5. Adaptive silencing technology ensures quietness in use.

6. Output effective power up to 98%.

2. Technical Index:

Shielding Objects

Mobile phones, recording pens and other sound acquisition devices


conveniently & effectively & quietly shield audio recording devices

Shielding Distance of single jammer in the system

1-2 m (also depends on mic sensitivity and ultrasonic signal strength)

Ultrasonic Transducer

(Transmitting Terminal):

4pcs each jammer main unit

Shielding Angle of single jammer in the system


Switch Method

remote control

Power Adjustment Method

knob adjustment

Battery Type

Built-in DC5V 1500mAh lithium battery, can continuously work for 3-4 hours on a full charge

Power Supply(Charger)

AC charger (Input: AC100V-240V; Output: DC9V/500mA)

Maximum Output Power


Power Consumption


Main Unit Size

122*78*27 mm


200g(each main unit)

Working Temperature


Relative Humidity



 2pcs power adapters(with AC plug), 2pcs remote controls, 2pcs jammer storage bag(for hidden use), PP suitcase



First of all, thank you for reading the system profile. WS-4 ultrasonic audio recording shielding system is a new type of recording shielding system developed by our R&D team in combination with our existing products and customer needs. It consists of two sets of ultrasonic audio recording jammers, each with four ultrasonic transducers and power adjustment knobs. When you open the two sets of jammers simultaneously, it can achieve a better audio recording shielding effect.

In order to ensure the shielding effect, the basic configuration of the system is two sets of ultrasonic audio recording jammers, which can not be less than two, but can be added. The software of each jammer main unit adopts a silent encryption algorithm based on identification, which ensures that the recording file can not be deciphered and decomposed. This algorithm is widely used in mobile phone data encryption and is extremely secure. Self adaptive mute technology is adopted to ensure the invisibility and security of visitors without any discomfort after turning on.


3. Applicable Place:

Flexible use scenarios such as conference room, office, court, reception room, confidential meeting, car meeting, private meeting, high-level meeting, business negotiation, leisure club, party, etc.

Leadership office, combat command centers, and other places to prevent illegal recording.

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