Features: Adjust the voltage clockwise to high and counterclockwise to low, and start adjusting the voltage for charging. When the power supply is outage, it will automatically switching to the battery to supply power to the load, while the power supply charges the battery. The size of the power switching module is 69x48x18mm/2.72x1.89x0.71inch, and the installation size is approximately 61x41mm/2.4x1.6nch. With adjustable voltage control to achieve precise voltage adjustment for better performances. Quality plastic and can be easily integrated into intelligent electronic setting. Specifications: Material: Plastic+Metal Size: approx. 69x48x18mm/2.72x1.89x0.71inch Voltage: 12V Current: 10A Package Includes: 1Pc Power Auto Switching Module(without housing) note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.