Pro-Fill On-Board Battery Watering System for golf car batteries provides the most convenient and accurate way to fill and maintain proper battery water levels. Hard-to-reach batteries are just as easy to fill as batteries on a workbench with Pro-Fill. Several batteries can be filled safely and simultaneously from a single remote position without ever having to touch a battery or remove a cap. Pro-Fills automatic control valves ensure each cell is closed when the precise level is reached. Automatic shut-off prevents over- or under-watering. Simple hand pump operation. Use with any distilled water container. Quick disconnect feature allows supply to be attached in a snap Safer & more accurate than conventional filling Improves battery life & performance Several batteries can be connected & filled at the same time | Flow-Rite Controls On-Board Battery Watering Systems, 48-Volt Kit for six 8-volt batteries