OptiMATE 4 Dual Program, TM-341, 9-step 12V 1A Battery Saving charger-tester-maintainer OptiMATE 4 Dual Program includes two charging programs; program 1 is for direct charging of a battery, program 2 allows safe and unsupervised charging SAVE: Low Volt Start of 0.5V 2-step desulphation recovery (1-step low volt pulse save during CAN-bus mode); CHARGING AMPS: 1 A (constant current) Model TM-341 IDEAL FOR: STD, AGM AND GEL 12V batteries from 3 - 50Ah Automatic KEY-LESS activation and continued maintenance until charger is disconnected INPUT: Global (100-240V 50-60Hz), high efficiency (CEC listed), fully sealed