Features： 1、Prevents electronic memory loss when disconnecting a vehicle's battery and preserves vehicle codes and electronic presets. 2、Alligator clip car charger, you can use this car data saver to keep your car's computer powered while you replace the car's storage battery. 3、This Car Data Saver features surge voltage protection and output protection. It is a very useful tool for car service. 4、It needs an additional 12V storage battery as a temporary power supplier and outputs the voltage which it receives to the car. It is a very useful tool for car service. 5、Great for keeping the computer memory alive while working on the car. Specification： Features: Prevents electronic memory loss when disconnecting a vehicle's battery and preserves vehicle codes and electronic presets. Alligator clip car charger, you can use this car data saver to keep your car's computer powered while you replace the car's storage battery. This Car Data Saver features surge voltage protection and output protection. It is a very useful tool for car service. It needs an additional 12V storage battery as a temporary power supplier and outputs the voltage which it receives to the car. It is a very useful tool for car service. Great for keeping the computer memory alive while working on the car. Specifications: Model: EM275B Material: plastic Color: black Input voltage: DC 12V Operating temperature: 0℃-40℃ Storage temperature: -10℃-50℃ Package size: 16.5*12*5cm Package weight: 215g Package list: 1 x Car Data Saver Package List： 1 x Car Data Saver