The SP Tools 12V Electrical System Analyzer with Printer, No. SP61065, is designed to test batteries and charging/starting systems with one-click. It displays and prints time stamped reports such as effective CCA, battery voltage, percentage of battery health and condition, charge system analysis, and starter system analysis. The unit features an auto-saving function to ensure latest test results are saved for reviewing or to store digitally via USB cable and multi-function testing. It is also easy to use with a 5" by 2.5" interface, doesn't require additional batteries, has a capacity of 100-2,000 CCA, 8-30V input voltage, and offers circuit and reverse polarity connection protection.