This Smart Charger is designed for rapidly charging either 6V or 12V lead acid batteries with a 3A current. There is a switch on the charger to select either 6V or 12V charging voltages. If you need to charge either a 6V or 12V lead acid battery, this is the most cost effective choice. Alligator clips are installed in output terminal with 12" cable. This smart charger can be used worldwide and features 3 stages charging.