EST-807J25 Built-in Antenna Signal Jammer
The EST-807125 built-in antenna signal jammer (also known as a signal interferer, blocker, suppressor, cutoff device, isolator, or conference information security device) is a high-tech product meticulously developed by our factory using advanced foreign technology. It is specifically designed to address the widespread problem of exam cheating via mobile phones during national college entrance exams, adult education exams, self-study examinations, and other academic assessments at various colleges and universities, as well as the growing issue of middle and high school students using their phones to send unauthorized text messages during class. In addition, it effectively tackles the nuisance and interference caused by mobile phones in formal settings such as government offices, corporate meeting rooms of all sizes, concert halls, and cinemas. By taking into account the actual conditions of domestic mobile communications, this device successfully blocks 2G/3G/4G/5G cellular signals and Wi-Fi signals within a radius of 1 to 30 meters, rendering mobile phones unable to make or receive calls and disabling Wi-Fi functionality—while ensuring that other electronic teaching equipment remains unaffected. Once the mobile phone moves outside the jamming zone, normal operation is automatically restored.
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Product details
Technical Specifications
| Project | Parameters | Frequency (unit: MHz) | Transmit Power |
| Transmission frequency band | 1.CDMA | 850–894 (Route 2) | 5W |
| 2.DCS/PHS | 1800–1920 (Route 2) | 5W | |
| 3.GSM | 925–965 (Route 2) | 5W | |
| 4.WCDMA | 2110-2170 (Route 2) | 4W | |
| 5.5G1 | 3300–3600 (2 routes) | 4W | |
| 6.5G2 | 4800–5000 (Route 2) | 2W | |
| 7.2.4G/4G1 | 2300–2500 (Route 2) | 4W | |
| 8.4G1 | 2510-2600 (Route 2) | 4W | |
| 9.4G2 | 2600–2680 (Route 2) | 4W | |
| 10.5G3 | 758–803 (Route 2) | 5W | |
| 11.TD | 2005–2030 | 4W | |
| 12.5.8G | 5715-5860 | 2W | |
| 13.5.2G | 5150-5350 | 2W | |
| 14.VHF | 135-175 | 4W | |
| 15.UHF | 400-470 | 4W | |
| Weight | 4KG | ||
| Size | 435*345*115mm | Host dimensions | |
| Power consumption | 300W | ||
| Operating voltage | AC-220V | ||
| Precautions | 1. During installation, keep the device as far as possible from strong magnetic fields and high-temperature sources. 2. Do not power on the device after it has been submerged in water. The device contains fragile components; do not drop or impact it. | Customization services are available; please consult with engineering personnel to confirm details if customization is required. | |
| Cleaning and Maintenance | Do not use chemical solvents when cleaning; a damp cloth is sufficient. No maintenance required. |
Product Features
The EST-807125 built-in antenna signal jammer (also known as a signal interferer, blocker, suppressor, cutoff device, isolator, or conference information security device) is a high-tech product meticulously developed by our factory using advanced foreign technologies. It is specifically designed to address the growing problem of exam cheating via mobile phones during national college entrance exams, adult education exams, self-study examinations, and other tests at various colleges and universities, as well as the widespread issue of middle and high school students sending unauthorized text messages on their phones during class. In addition, it effectively tackles the nuisance and interference caused by mobile phones in formal settings such as government offices, corporate meeting rooms of all sizes, concert halls, and cinemas. The device can block 2G/3G/4G/5G cellular signals and Wi-Fi signals within a radius of 1 to 30 meters, rendering mobile phones unable to make or receive calls and disabling Wi-Fi functionality, while ensuring that other electronic teaching equipment continues to operate normally. Once the mobile phone moves outside the jamming range, it automatically resumes normal operation.
➢1. Jamming Capability: Blocks 2G/3G/4G/5G, 2.4 GHz/5.2 GHz/5.8 GHz Wi-Fi, and walkie-talkie VHF/UHF bands, with a built-in independent 25-channel module.
➢ 2. The enhanced power-management design ensures the stability and accuracy of high-frequency signals, while a reliable power supply guarantees the jammer’s dependable performance and long service life. The device features an integrated design with built-in power supply and antennas, which are immune to interference from high-frequency signals, making installation simple, storage convenient, and resistance to damage high.
➢ 3. The ACOPS chip-based overheating prevention system is employed to prevent the signal jammer from overheating due to improper user operation or excessively high ambient temperatures, thereby effectively ensuring the jammer’s long-term stable performance and maintaining its shielding effectiveness.
➢ 4. The device features a dedicated switch for the walkie-talkie frequency band, enabling customers to selectively disable this band as needed.
➢ 5. Average transmit power per channel: 2–5 W; total power: 100 W; effective shielding range: 1–30 meters (depending on signal strength at the installation site).
➢ 6. Customization options: The equipment can be equipped with an LED LCD display and an automatic detection system that performs power-on self-tests to verify signal integrity and monitor the machine’s voltage, current, temperature, and signal status.
➢ 7. The equipment is equipped with corresponding LED indicator lights to facilitate monitoring of whether the machine is operating normally.
➢ 8. Built-in silent fan ensures a noise-free examination environment.
➢ 9. The body features an ergonomically designed handle for easy carrying.
➢ 10. The jammer’s transmission power is comparable to that of a mobile phone signal, and wireless transmission poses no harm to the human body.
➢ 11. Optional network management and control: the smart blocking management system can be used to remotely turn devices on and off, as well as schedule timed power-on and power-off.
Keywords
Air air heat exchanger series | Air water backpack series | Ventilation system | Non standard customized series
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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
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