The 12V 2 AMP 8 AMP and 15 AMP selectable smart battery charger is great for automotive marine industrial and heavy-duty applications. Equipped with an LCD display for easy to read charging status charging current voltage battery type (chemistry) and error messages. The charge rate selection button makes it easy to change from 2 AMPs 8 AMPs and 15 AMPs. Connect the hard-wired clamps to your 12V battery plug in the AC power cord and select your charging mode of choice. smart battery chargers extend battery life 2X or more.