fast shipping and no problems
    Equipment of good quality, very responsible seller and fast delivery. I recommend to all Alibaba community / AliExpress. I will definitely buy more units.
    Best seller,good transaction and fast delivery time
Contact Person : Amy Cheah
Phone Number : +86 134 1856 8064
WhatsApp : +8613418568064

Knob Adjustment 2-4m Ultrasonic Audio Voice Recording Jammer

Place of Origin China Mainland
Brand Name EST
Certification CE, RoHS
Model Number 007NK
Minimum Order Quantity 1
Packaging Details Neutral Packing
Delivery Time 5-10 working days
Payment Terms Paypal, Western Union, T/T

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Product Details
Shielding Type Mobile Phones, Recording Pens And Other Sound Acquisition Devices Shielding Distance Of Single Host In The System 2-4 M (shielding Distance Of Different Recording Equipment Is Different)
The Function Angle Of System Single Host Horizontal 180°/ Vertical 90° Opening Mode Remote Control
Power Adjustment Mode Knob Adjustment Host Size 260*260*160 Mm
Host Weight 2kg Power Supply AC 100V~240V
Packing Protective Box Ambient Temperature -40℃~55℃
Relative Humidity 35~85%
High Light

Remote Control Audio Jammer Device


Air Purifier Silent Audio Jammer

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Product Description
2020 Latest Ultrasonic 2-4m Strong Audio / Voice Recording Jammer + Air Purifier(tested on iPhone 7 / X / 11 series)
Item Parameter
Model No.: EST-007NK
Shielding Type: mobile phones, recording pens and other sound acquisition devices
Shielding Distance: 2-4m (shielding distance of different recording equipment is different)
Function Angle: Horizontal 180°/ Vertical 90°
Opening Mode: remote control
Power Adjustment Mode: stepless adjustment of knob
Host Size: 260*260*160mm
Weight: 2kg
Ambient Temperature: -40℃~55℃
Relative Humidity: 35~85%
Charger: AC 100V~240V 
Packing: Protective box


1. desktop use ultrasonic audio recording jamme r+ Air Purifier(works well on iPhones after
2. with AC plug in(power supply: AC 100V~240V)
3. working frequency: all voice recording devices
4. shielding radius: 2-4 meters (depends on mic sensitivity and ultrasonic signal strength)
5. size / weight: 260x260x160mm / 2KG (not including accessory)





1. The jammer needs no special maintenance.

2. Do not use chemical solvents or prevent water from entering into the device when cleaning its surface.

3. When not use, the device must be placed in dry and ventilated places, to avoid its contact with salty mist and noxious gases.

4. The warranty period is one year. It is repaired free of charge for three years and maintained for life, only need buyer bear the shipping cost it has.



Application Place

1.Meeting room, party and government organizations, enterprises and small medium and large conference rooms, concert halls, and etc.

2. At places where using recording device is prohibited such as government, military, finance, security, police and command center etc.

Knob Adjustment 2-4m Ultrasonic Audio Voice Recording Jammer 0


1 year from delivery date

Packing Details:

1pcs Audio Recording Jammer Host

1pcs AC Adapter

1pcs Protective box

1pcs Remote Control

Knob Adjustment 2-4m Ultrasonic Audio Voice Recording Jammer 1
Knob Adjustment 2-4m Ultrasonic Audio Voice Recording Jammer 2