Features 【Stay Powered Up】Our controller ensures uninterrupted power supply by automatically switching to battery during power outages. Prioritize the main power supply, and automatically switch to the battery when the power is off. When mains power is restored, switch to mains again. There is a power outage of less than 1 second during the switching process. 【Easy Installation】Designed with screw terminals for easy wire connection, our controller is simple to install and use. 【Versatile Use】Ideal for controlling power supply of incubators, laptops, networks, and more. 【Smart Technology】Our controller automatically identifies voltage between 12V and 48V DC, making it a smart choice for any system. 【Satisfaction Guaranteed】We offer fast and convenient return or replace service to ensure worry-free purchasing. Contact us with any questions. Features: This controller is used for emergency battery switching; when there is power on main power source terminal, it will connect to main power source as power supply; otherwise, it will automatically switch to battery. When the power on main power source is back, it will switch to main power. Designed with screw terminals for convenient wire connection. Convenient to use, it will automatically identify voltage between 12V and 48V DC. Widely used for controlling power supply of incubator, laptop, network. Specifications: Voltage: DC12V~48V Load Current: 10A Size: 5*3*1.8cm/1.9*1.2*0.7in Quantity: 1 Weight: 22g(approx.) Note: 1, Voltages of power source, battery and load should be the same. 2, When it switches, there will be a temporary power failure for about less than 1 second. Package Includes: 1 x Controller Package List