Anti-theft devices are tools designed to prevent theft and protect valuable items. Common examples include alarms, locks, and GPS trackers. These devices can be installed in homes, vehicles, or on personal belongings to deter thieves and alert owners of unauthorized access. Many anti-theft devices work by emitting loud sounds when tampered with or sending notifications to a smartphone. Some advanced systems use biometric technology or smartphone apps for added security. By using these devices, individuals can enhance their safety and reduce the risk of losing their possessions to theft.