This is a Powermax 4-stage smart charging power converter that works with any battery type. It features an LED status indicator light, variable voltage adjustment, and internal cooling fan. This product replaces PM3-75E - 4 stage smart charging - Fixed power supply mode - Variable voltage adjustment - 13Vdc - 16.5Vdc - Works with any battery type - Led status indicator light - Internally mounted cooling fan Warning: Product may contain materials cautioned by California Proposition 65