Many GPS trackers come in small sizes, making them easy to conceal in a vehicle’s interior or engine compartment. This feature is especially useful for covert tracking, such as tracking a vehicle for security or surveillance purposes. Hidden GPS trackers can also be useful for monitoring the driving habits of teenagers or employees without their knowledge. However, it’s important to note that placing a GPS tracker in someone’s vehicle without their consent is generally considered illegal, so it’s important to use them responsibly and within the confines of the law.