For 6 and 12 V batteries. Fan cooled. 200 A 12 V/100 A 6 V engine start. 40 A rapid charge, 10 A fast charge and 2 A trickle charge. Multi-function tester. Two rotary switches. Volt meter for battery testing. Discharge rating: 3/12/50 A. 19 in H x 11.7 in W x 9-7/8 in depth. 27.3 lb. cULus Listed.