This used Mac Tools ET3707 Digital Engine Analyzer comes with test leads and features a 10 Megohm input impedance for diagnostic work. It is a practical tool for technicians or automotive enthusiasts performing engine analysis and electrical system troubleshooting. Free shipping is available for this item. The condition is clearly stated as used. As a specialized piece of equipment, it is suitable for someone familiar with engine diagnostics. Check the listing for full details, including the complete specification and any specific inclusions or notes about its operational state. Mac Tools Et3707 Digital Engine Analyzer 10 Megohms with Leads. Condition: Used. Listed at 57.05 USD. The Mac Tools ET3707 is a digital engine analyzer designed for troubleshooting and maintaining passenger vehicle engines. This information is to be used for reference only. Full Functionality - This item is in full working order with all features operational.