Signal Jammer is an electronic device designed to disrupt, block, or jam wireless communication signals within a specific frequency range. This can be used for various purposes, ranging from maintaining security and privacy to enforcing regulations and preventing unauthorized communication. These are sometimes used in educational institutions during exams to prevent cheating by blocking students' access to mobile phones and other communication devices. Higher-power jammers with directional antennas generally have a longer effective range compared to lower-power models. Signal Jammer is commonly used in sensitive areas such as military installations, government facilities, prisons, and corporate boardrooms to prevent eavesdropping, espionage, and unauthorized access to wireless networks.