Providing Fair and Secure Environments for High-Stakes Examinations
• Background
This solution is applicable to national and provincial-level high-stakes standardized examination venues in various countries, including university entrance examinations, postgraduate admission tests, public servant recruitment exams, and other large-scale unified examination scenarios that have extremely high requirements for fairness and anti-cheating measures.
• Main Challenge
Mobile phone cheating (full-frequency, concealed, anti-interference)
• Key Requirements
No dead zones, avoid legitimate device interference, compliance risk control
Comprehensive Blocking
All 2G-5G mobile signals
No Dead Zones
Signal strength ≤ -95dBm
Compliance
Equipment meets standards, blocking range within exam boundaries
Stability
4-6 hours continuous operation, no interference with other devices
High-stakes standardized examination venues
Opera House
Government confidential occasions
Recommended Installation Diagram (with tripod/wall mount)
Note: Export requires coordination with the client regarding signal frequency bands for tuning and application scenarios.
The EST-802J12 Built-in Antenna Signal Jammer (also known as Signal Interferer/Isolator/Suppressor/Cutter/ Isolator/Meeting Information Confidentiality Device)
Based on mobile communication landscape, this high-tech product successfully blocks GSM/DCS/CDMA/PHS/3G (TD SCDMA/CDMA2000/WCDMA)/4G/5G signals within a 1-15 meter radius (1-200 square meters). and 2.4G wireless signals. This prevents phones from making or receiving calls and renders walkie-talkies inoperable, while ensuring no interference with other electronic teaching equipment. Mobile phones resume normal functionality once outside the signal-blocking zone.
| Frequency Bands Blocked | GSM / DCS / CDMA / PHS / 3G / TD-SCDMA / CDMA2000 / WCDMA / 4G / 5G / 2.4G Wi-Fi |
| Housing | Plastic casing; OEM branding & color customization available |
| Transmission Power | 24W total |
| Effective Shielding Range | 1–15m (factory-calibrated per customer requirements) |
| Human Safety | Claimed completely harmless to humans |
The BH-201L12 Signal Jammer is a high-tech device operates within a 1–25 meter radius (50–250 square meters), effectively blocking 2G, 3G, 4G, 5G, and WiFi 2.4G, 5.2G, 5.8G signals within a radius of 1-25 meters (50-250 square meters). This high-power device prevents phones from making or receiving calls without interfering with other electronic teaching equipment. Phones and walkie-talkies resume normal functionality once outside the blocked range. Restore tranquility to schools and meetings. Features a display screen showing four operational functions: voltage detection, current detection, temperature detection, and signal detection.
| Frequency Bands Blocked | GSM / DCS / CDMA / PHS / 3G (TD-SCDMA / CDMA2000 / WCDMA) / 4G / 5G / Wi-Fi 2.4 / 5.2 / 5.8 GHz |
| Housing & Cooling | ABS casing with built-in aluminum heat dissipation module + cooling fan |
| Transmission Power | 80W |
| Effective Blocking Radius | 1–25m |
| Status Display | Shows voltage, current, temperature & signal detection |
The BH-201L8 Built-in Antenna Signal Jammer (also known as signal interferer/blocker/suppressor/cutter/isolator/conference information security device)
This device can block 2G/3G/4G/5G mobile phone signals and WIFI wireless signals within a radius of 1-30 meters, making mobile phones unable to make or receive calls and WIFI unable to work normally. However, it will not interfere with the operation of other electronic teaching equipment. When mobile phones are taken out of the blocked area, they can resume normal use.
Product Features
| Interference Capability | 25 independent modules; covers 2G/3G/4G/5G, Wi-Fi 2.4/5.2/5.8GHz, VHF/UHF walkie-talkie bands |
| Transmission Power | 2–5W per channel; total power ~100W |
| Effective Jamming Range | 1–30m (depends on on-site signal strength) |
| Energy & Structural Design | Integrated power supply + antennas; stable high-frequency performance; easy installation & storage; durable |
| Overheat Protection | ACOPS overheating prevention system ensures long-term stability |
| Selective Jamming | Independent switch for walkie-talkie frequency band |
| Status Indicators | LED indicators for normal/fault status |
| Noise Control | Built-in mute fan for quiet environments (e.g., examination rooms) |
| Portability | Ergonomic carrying handle |
| Human Safety | Transmit power comparable to mobile phones; no harm to human body (manufacturer claim) |
| Optional Features | LED/LCD display + auto signal detection + monitoring of voltage/current/temperature/signal status |
| Network Management (Optional) | Remote ON/OFF and scheduling via intelligent management system |
The BH-201L Signal Jammer (also known as signal interferer/blocker/suppressor/cutter/isolator/conference information security device)
It can block GSM/DCS/CDMA/PHS/3G (TD-SCDMA/CDMA2000/WCDMA)/4G/5G mobile phone signals and WIFI (2.4G/5.2G/5.8G) wireless signals within a radius of 1-30 meters (covering an area of 50-250 square meters). Within this range, mobile phones cannot make or receive calls, thus maintaining a clean environment for school examination rooms and a quiet atmosphere for meetings.
Product Features
| Coverage | 100–200㎡ (indoor, -75dBm, unobstructed; varies by base station proximity) |
| Power & Bands | 50W total (5W per channel); blocks 2G/3G/4G/5G + Wi-Fi 2.4–5.8GHz |
| Power Stability | Precision voltage-stabilizing circuit ensures normal operation under voltage fluctuations |
| Core Components | Original chips & circuit boards for high efficiency, stability & long service life |
| Housing | Durable ABS shell; waterproof, wear-resistant, heat-resistant |
| Cooling System | Convection vents + built-in heat sinks + fans for efficient heat dissipation |
| Design | Compact, simple appearance, minimal space usage |
| Human Safety | Environmentally friendly; harmless to human body (manufacturer claim) |
| Installation | Easy & convenient setup |
