With the Victron-Connect app you can connect these chargers to your smartphone, tablet or PC via Bluetooth and view the initial setting and charging data. Voltage: 180/265 VAC 45/65 Hz 250/350 VDC 6-stage charger: TEST - BULK - ABSORPTION - RECREDITION - FLOAT - STORAGE, with control LED for charging status display. With microprocessor that adjusts the way the battery is charged. Fuses: against short circuit, polarity change, overheating. The "Storage" function automatically lowers the Float function to 13.2V to reduce gasification and corrosion of the positive plates. IP22. Suitable for any battery, including Li-ion batteries