The BW-03 is a smart piece of equipment which monitors the battery status or batteries and displays it intelligently. The smart design with a minimum of components gives a broad range of information in the blink of an eye. The BW-03 Microprocessor controlled Battery Monitor with under and overvoltage alarm. 8 programmable voltage thresholds. Power save. Automatic detection battery voltage. Ideal for 12/24 Vdc systems.