Features Malinly Function: 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 How to Use: The battery charging controller can be 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 10A CURRENT: With 10A high current relay, suitable for any 12-48V variety of batteries and Lithium batteries Practical:Convenient to use, it will automatically identify voltage between 12V and 48V DC Application:The DC battery switching module widely used for controlling power supply of incubator, laptop, network to achieve uninterrupted power supply 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