Exam Hall Signal Jammer Solution – Xide County Education Bureau in China

Background of the Examination Room Signal Jammer Project

Xide County, Liangshan Yi Autonomous Prefecture, Sichuan Province, located in the southwestern mountainous area of the Sichuan Basin, covers a total area of 2,206 square kilometers. As of May 2021, Xide County administers 7 towns and 6 townships.

By 2018, Xide County had 76 schools of various types and levels. These include 23 kindergartens with 338 classes and 10,952 students, 46 primary schools with 638 classes and 28,493 students, and 5 junior high schools with 157 classes and 8,512 students. With the rapid expansion of education and full 5G coverage, the Xide County Education Bureau decided to upgrade standardized examination centers with advanced anti-cheating devices, especially mobile phone signal jammers, setting higher technical requirements.

Dexinkang Electronic Technology Co. Ltd., leveraging advanced technology and reliable after-sales service, was selected as the sole supplier of mobile phone signal jammers for high school and college entrance examination centers in Xide County.

Product Introduction: N-14-120W Examination Room Signal Jammer

The N-14 mobile signal jammer is a high-tech information security device designed by Dexinkang. It effectively jams all major communication bands, including 2G, 3G, 4G, 5G, and 2.4G Wi-Fi (WLAN, ZigBee, Bluetooth), creating a secure electromagnetic field to prevent wireless devices from connecting to external networks.

It is a directional jamming device designed for classrooms, prisons, and other specific scenarios, providing a true large-scale solution by emitting interference signals in a single direction. Unlike traditional 360-degree omnidirectional jammers, it focuses signal jamming for stronger coverage and higher efficiency without wasting any signal. It is ideal for prison, examination rooms, confidential meetings, and other sensitive environments.

Key Features and Benefits:

• Large Coverage Area: 100–800 square meters (40 dBm frequency output, indoor unobstructed; actual range varies with base station distance).

• High Power: 120W total (5-10W per channel), efficiently jamming mobile networks and Wi-Fi.

• Adjustable Power: Our single jammer can cover a medium-to-small examination room of 200 square meters as well as a large examination hall over 200 square meters. 

• Stable Performance: Precise voltage regulation ensures normal operation under power fluctuations

• Durable Components: Original chips and circuit boards for long-term, reliable performance

• Robust Design: ABS casing, waterproof, wear-resistant, heat-resistant

• Efficient Cooling: Ventilation holes, heat sinks, and fans prevent overheating

• Compact & Space-Saving: Sleek, minimal footprint

• Environmentally Friendly & Safe: No harm to humans

• Easy Installation: Wall-mounted or desktop, flexible antenna adjustment

Installation Guidelines:

• Maintain 1.8–2.5 meters installation height; avoid obstacles between jammer and target area

• Wall-mounted antennas should be vertical; desktop antennas can be bent 90°

• Keep at least 1–2 meters distance from speakers, wireless microphones, computers, TVs, and Wi-Fi routers

• Normal heating during long operation is expected; turn off if overheating occurs

Project Results and Case Impact

Dexinkang expedited production and delivered the signal jammers promptly. During subsequent high school and college entrance examinations, the N-14 provided full coverage and reliable signal blocking. The devices received high praise from Xide County Education Bureau officials and examination invigilators for their effectiveness and stability.