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AJ-300 · Signal detector
Cell Phone Signal Detector with Jammer Interface
Monitor four cellular bands at once. Adjust detection sensitivity, configure alarm outputs, and connect an optional compatible jammer for an automatic response to detected transmissions.
- Simultaneous detection across four cellular bands.
- Adjustable sensitivity from −55 to −30 dBm.
- Independent channel control and programmable alarm outputs.
- Timed outputs and support for 24-hour operation.
Product code: AJ-300
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Tell us where you plan to use the unit and which frequency bands you need.
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Speak to our team: +39 080 302 6530
The AJ-300 detects signals. Signal blocking requires an optional compatible jammer; confirm compatibility when ordering.
Product overview
Detect Activity. Configure the Response.
Four Bands, Monitored Together
Dedicated detection circuits monitor CDMA, GSM, DCS, and 3G signals simultaneously within the listed receive bands.
Adjustable Sensitivity
Set sensitivity from −55 to −30 dBm and manage channels independently. The specified detection range is 15–30 meters.
Programmable Outputs
Configure alarm and timed outputs, or connect an optional compatible jammer to respond automatically to detected activity.
Product details
Full description
Monitor Cellular Transmissions
The AJ-300 monitors four cellular frequency bands simultaneously: CDMA, GSM, DCS, and 3G/UMTS. Each band uses its own detection circuit, with independent channel management and adjustable sensitivity.
The detector responds to transmissions within the listed receive bands. Its specified detection range is 15–30 meters. It does not establish universal coverage of all phones or cellular networks.
Connect Detection to an Automatic Response
When connected to a compatible optional jammer, the AJ-300 can trigger signal blocking after detecting a transmission. The stated jammer activation time is no more than 20 ms; confirm this timing with the selected jammer and configuration.
Programmable alarm outputs, timed outputs, and 24-hour operation support continuous monitoring. The detector itself does not block signals. This product is intended for authorized government, military, and law enforcement use.
Technical specifications
| Sensitivity | Adjustable from −55 to −30 dBm |
|---|---|
| Detection range | 15–30 meters |
| Power supply | 110–240 V |
| Operating temperature | −10°C to +70°C |
| Humidity | 5–80% |
| Dimensions | 22.5 × 16.5 × 4.5 cm |
| Weight | 1.8 kg |
| Current consumption | < 500 mA |
| Band | Frequency (MHz) |
|---|---|
| CDMA | 824–849 |
| GSM | 890–915 |
| DCS | 1710–1785 |
| 3G / UMTS | 1920–1980 |
Usage and restrictions
For Authorized Agencies
For use by authorized government agencies, military personnel, and law enforcement in the course of their official duties.
Sales and use are subject to local restrictions. Confirm the requirements in your jurisdiction before requesting product information.
Expert Support, Included
Before You Buy
Talk with our team about your requirements and available configurations.
After Your Purchase
Get help learning the equipment and answers to your product questions.
Technical support
Work directly with the Endoacustica team for technical assistance.
Explore the range
Related products
Compare signal detection and cellular jamming options. Jammer compatibility with AJ-300 must be confirmed separately.
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MJ-400GCellular and Wi-Fi Desktop Jammer
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JMLT-WIFIPocket Cellular and Wi-Fi Jammer
Compact option for GSM, 3G, and Wi-Fi.
MJ-6A93WSix-Channel Desktop Jammer
Desktop unit for cellular and Wi-Fi bands.
Contact our team
Request an AJ-300 Quote
Share your agency’s requirements. We’ll help confirm the configuration and provide pricing.
Or call: +39 080 302 6530