Features:Thiscontroller is used for emergency battery switching; when there is power on main power source terminal, itwill 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 usedfor controlling power supply of incubator, laptop, network.Specifications:Voltage: DC12V~48VLoad Current: 10ASize: 5*3*1.8cm/1.9*1.2*0.7inQuantity: 1Weight: 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