A GPS receiver is a device that determines its location using signals from satellites in the Global Positioning System (GPS). It calculates the receiver's position by measuring the time it takes for signals from multiple satellites to reach it. This information allows the receiver to provide accurate location data, which can be used for navigation, mapping, and various applications. GPS receivers are commonly found in smartphones, cars, and handheld devices. They help users find directions, track movements, and even locate lost items. The technology is widely used in many fields, including transportation, emergency services, and outdoor activities.