ProMariner 42021 ProSport 20-Amp 3-Bank Battery Charger Charges Flooded (lead-acid)/STD AGM, GEL & High Performance(HP) AGM Extruded Aluminum Housing Dynamic Thermal Output Control Pre-Wired for Easy Installation 100% waterproof and shockproof Chargers combine multi-stage charging with on-demand charge distribution, so 100% of the available power goes where it's needed most 3 built-in charging profiles for flooded, gel or AGM batteries Expanded LED status center shows AC power status, charge mode, battery type 100% waterproof and shockproof Voltage - Charger Input = 120v | Portable = No | Amps - Output = 20A | Voltage - Output (Volts) = 12/24/36v | Banks = 3 | Battery Type = Lead Acid/Gel/AGM | Charger Type = Multi-Stage