Features Designed with screw terminals for convenient wired connection. Widely used to control the power supply of incubator, laptop, network to achieve uninterrupted power supply. This controller is used for emergency battery switching; when there is current on the terminal of the main power source, it will connect to the main power source as power supply; otherwise, it will automatically switch to the battery. Convenient to use, it will automatically identify the voltage from 5V to 48V DC. When there is current on the main power source, it will charge the battery continuously. Features: Voltage: DC5 V ~ 48 V. Charging current: 10A Size: 6 x 3 x 1.8 cm/2.3 x 1.2 x 0.7 inches. Quantity: 1 Weight: 25 g (approx.) Note: 1, the voltages of power source, battery and charge must be the same. 2, when it rocks, there will be a temporary power failure for about less than 1 second. Package includes: 1 x Controller Package List