This fully functional mobile phone signal jammer is the latest product developed by our company for testing and protecting high-tech products. It can effectively shield (interfere) all mobile phone signals (GPS, GSM, DCS, PCS, TD-SCDMA, UMTS (3) G),) and WiFi (WLAN), 2.4GHz/Bluetooth communication, wireless network (QQ and Weibo, etc.), signal. Thoroughly prevent investigators from using mobile phones to deceive, ensure the fairness of the test, and create fair competition for students.