Features: This controller is used for battery switching; when there is power main power source terminals, it will connect to main power as power supply; otherwise, it will automatically switches to backup power source terminals as power supply. Automatic switching between two power sources. Short switching interval. Simple to use, page function description diagrams. Widely used for controlling power supply of incubator, laptop to achieve uninterrupted power supply. Specifications: Material:ABS Input voltage: AC85V-240V Output current: maximums 10A Size:Approx.70mm/2.76''x49mm/1.93'' Package Includes: 1Piece Automatic Power Switches Module note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.