100% brand, quality unit built for reliable, consistent performance. Designed to meet everyday power management needs without compromise. Emergency battery switch: automatically switches to battery power when 12V adapter power is off, preventing interruption to connected equipment and avoiding data loss or downtime. Clear function and compatibility: works with 12V adapter power and 12V battery sources. Supports control current up to 12A and total power up to 150W at 12V, suitable for many common 12V devices. Copper terminals design: durable copper terminals make wire connections quick and secure, improve conductivity, and reduce the risk of loose connections during installation or maintenance. Key benefits: Uninterrupted operation: automatic switchover keeps critical devices running during adapter failure or power interruptions. Easy installation and maintenance: copper terminals simplify wiring and reduce installation time. Proven performance: rated for up to 12A and 150W at 12V to reliably handle mediumload 12V systems. Typical applications: Security and surveillance: maintain power to security cameras and DVRs during adapter outages to preserve continuous monitoring. Vehicle and mobile power: ensure infotainment, lighting, or small ancillary devices remain powered in cars, RVs, or boats when external adapter power is lost. Home and small office equipment: support routers, LED lighting, or small appliances that require stable 12V power and benefit from a seamless battery backup. Material and performance notes: Terminals: copper for improved conductivity and connection stability. Electrical rating: up to 12A control current and up to 150W total power at 12V. Operation: automatic switching between adapter and battery power—no manual intervention required. This product provides a straightforward, reliable solution for maintaining 12V power continuity, simplifying wiring, and supporting devices within the specified 12A/150W limit.