This device can operate from any 12V DC power source, including a , a DC 12V lead-acid battery, or other car's DC 12V power outlet. Time-saving and efficient, a great tool for replacing car batteries. Prevents data loss during a power outage on the car's onboard computer, preserving stored information such as the instrument panel, audio system, storage compartment, and digital clock. Reliable upgraded design and improved craftsmanship. Tested output and input power are normal. Product Name:CAR BATTERY REPLACEMENT TOOL REPLACE THE OLD BATTERY WITHOUTLOSING COMPUTER DATA Please check as much as possible to make sure the item is what you need. Color:As Shown Material:plastic Package Contents: 1 * Car Diagnostic Tool 1 * Instructions in Chinese and English Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.