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.