Strongway 7-Stage Smart Charger and Battery Tester -12 Volt System has 4 separate charging modes: normal, winter, maintenance and repair to match your needs 4 testing modes available as well: battery voltage, alternator check, battery boost capability, and Cold Cranking Amps Selector allows you to choose the proper battery type: standard, gel/wet or AGM Reverse polarity protection with LCD display ensures battery safety Includes DC output cable with connectors