A Line Interactive UPS (Uninterruptible Power Supply) is a power protection device designed to provide backup power and voltage regulation during power interruptions or fluctuations. It features an automatic voltage regulator (AVR) that corrects minor power issues like sags and surges without switching to battery power, making it more efficient and ideal for environments with unstable power supply. In the event of a complete power failure, the UPS quickly switches to battery mode to provide continuous power to connected devices, ensuring safety and preventing data loss. This type of UPS is commonly used for home electronics, office systems, and small servers.