TJ Shield -1
The EST-807J25 is a full-band, all-in-one, high-power signal jammer with built-in antennas, capable of simultaneously blocking 2G/3G/4G/5G cellular signals, 2.4G/5.2G/5.8G Wi-Fi signals, and VHF/UHF walkie-talkie signals. Featuring a built-in antenna design, the device is easy to install and offers robust protection. It includes independent band switches, silent cooling, and intelligent temperature control, making it ideal for exam room confidentiality, maintaining quiet in meeting rooms, safeguarding classified information in government agencies, ensuring noise-free operations in theaters and libraries, and other indoor areas where communication is prohibited.
Category:
Product details
I. Product Description (Features + Scope of Application)
The EST-807J25 is a full-band, built-in-antenna, all-in-one high-power signal jammer that can simultaneously block 2G/3G/4G/5G cellular signals, 2.4G/5.2G/5.8G Wi-Fi signals, and VHF/UHF walkie-talkie signals. Featuring a built-in antenna design, the device is easy to install and offers robust protection. It includes independent band switches, silent cooling, and intelligent temperature control, making it ideal for exam room confidentiality, quiet meeting rooms, classified information protection in government agencies, noise-free management in theaters and libraries, and various indoor areas where communication is prohibited.
Scope of Application
Examination halls for the National College Entrance Examination, High School Entrance Examination, Self-Study Examination, Adult College Entrance Examination, and other similar exams; government and corporate conference rooms; libraries; concert halls; cinemas and theaters; courtrooms; detention centers; quiet zones in hospitals; classified offices; and standardized examination centers.
II. Operating Principle
Utilizing broadband white-noise suppression technology, the device synchronously outputs RF jamming signals across 25 independent channel modules, covering the full frequency spectrum of cellular communications, wireless LANs, walkie-talkies, and more. This effectively prevents nearby mobile terminals from accessing base stations, disables Wi-Fi connectivity, and blocks walkie-talkie transmission and reception, thereby achieving mandatory signal isolation within the designated area. The device is equipped with an intelligent power-management and overheating-protection system, ensuring long-term, stable jamming performance without interfering with other nearby electronic educational equipment.
III. Core Technical Parameters
· Product Model: EST-807J25
· Shielded channels: 25 independent modules
· Jamming range: radius of 1–30 meters (depending on the signal strength of the surrounding environment)
· Total transmit power: 100 W (per channel: 2–5 W)
· Power supply: AC 220V mains power
· Total power consumption: 300W
· Operating temperature: Standard indoor environment
· Dimensions: 435 × 345 × 115 mm
· Weight: 4 kg
· Cooling: Built-in silent fan
· Antenna: Fully built-in antenna; no external antenna required.
· Optional features: LED display, remote network management and control, timed switching
Frequency Band and Power:
1. CDMA: 850–894 MHz (5 W × 2)
2. DCS/PHS: 1800–1920 MHz (5 W × 2)
3. GSM: 925–965 MHz (5 W × 2)
4. WCDMA: 2110–2170 MHz (4 W × 2)
5.5G1: 3300–3600 MHz (4 W × 2)
6.5G2: 4800–5000 MHz (2 W × 2)
7.2.4G/4G1: 2300–2500 MHz (4 W × 2)
8.4G1: 2510–2600 MHz (4 W × 2)
9.4G2: 2600–2680 MHz (4 W × 2)
10.5G3: 758–803 MHz (5 W × 2)
11. TD: 2005–2030 MHz (4 W)
12.5.8G: 5715–5860 MHz (2 W)
13.5.2G: 5150–5350 MHz (2 W)
14. VHF: 135–175 MHz (4 W)
15. UHF: 400–470 MHz (4 W)
IV. Product Features
1. Full-scene blocking
Simultaneously blocks 2G/3G/4G/5G, Wi-Fi, and walkie-talkies—comprehensive coverage with a single device.
2.25-way independent module
Independent and stable frequency bands with no mutual interference ensure more reliable shielding.
3. Independent on/off switch for walkie-talkie frequency bands
Can be switched on or off as needed to meet the varying shielding requirements of examination rooms and meeting venues.
4. ACOPS Intelligent Overheating Protection
Automatic high-temperature protection ensures 6–8 hours of continuous, stable operation.
5. Silent Fan Cooling
Operates silently, with no impact on exam or meeting environments.
6. Built-in integrated antenna
No external antenna required; simple installation, vandal-resistant, and aesthetically pleasing.
7. Ergonomic Handle
Facilitates transportation, relocation, and temporary deployment.
8. Optional Network Remote Management
Supports remote power on/off, scheduled control, and centralized management.
9. LED Status Indicator
Real-time display of operating status for easy maintenance and inspection.
V. Advantages
1.25-inch full-band coverage with thorough shielding, supporting all 5G standards.
2. Integrated built-in antenna design for simple installation and protection against theft and vandalism.
3. The walkie-talkie features an independent power switch for flexible operation, meeting the stringent requirements of examination venues.
4. Quiet cooling, ideal for quiet environments such as examination halls, meeting rooms, and theaters.
5. Intelligent temperature control protection ensures long-term continuous operation and extended service life.
6. Stable power output, radiation safety, harmless to humans, and no interference with surrounding educational equipment.
7. Supports customization and remote management, making it suitable for standardized testing centers and large-scale centralized management scenarios.
8. Equipped with a built-in handle for easy relocation and deployment.
VI. Disadvantages
1. This is a high-power jamming device that simultaneously blocks Wi-Fi, so it cannot selectively disable mobile phones while leaving the network intact.
2. Requires an external 220V power supply; no battery is included, so it cannot be used portably.
3. Large volume and weight, making it unsuitable for individual handheld use.
4. The shielding boundary is not precise enough; care must be taken to position it correctly in dense areas.
5. It is recommended to limit continuous operation to no more than 8 hours to prevent overheating.
Keywords
Air air heat exchanger series | Air water backpack series | Ventilation system | Non standard customized series
— Provide customers with a full range of customized system solutions
Contact Us
Address: East side of No. 7 Huanpu International Industrial Park, No. 835 Hanjiang West Road, Xinbei District, Changzhou City, Jiangsu Province
Tel：+86 0519-85522317
Fax：+86 0519-85529317
E-mail：sales@winder.hk
Mobile Website
Copyright © 2023 Winder Precision Machinery (Changzhou) Co., Ltd.