This professional battery charger is a Dual program type. The first program is specifically to charge and maintain Odyssey and other AGM and deep-cycle batteries. The second program is for all types of batteries (lead-acid, absorbed acid, Gel, etc.) with a capacity of more than 20Ah. Very easy to use-Connect to battery and mains power. The rest is fully automatic. In addition to its quick charging ability, AccuMate PRO is ideal for long term maintenance of the batteries of irregularly or seasonally used vehicles & appliances, "old-timer", veteran & collectors' vehicles. The easily detachable handle incorporating a cable storage reel and clamp storage can be mounted above the main housing (for carrying) or below (for wall-mounted application, by means of 2 pear-slots in the rear of the housing which engage on two screws in the wall). The compact charger dimensions of 5 1/2"x6 3/8"x6" high include the handle. Intelligent electronic protections against inverse polarity, short-circuit, over-heating with built in spark suppression. Additional fuse protections provided for eyelet connection set, AC input, and a thermal fuse protects the transformer. Complete with instructions. Quick-connect eyelet connection cable sets are available separately.