PRO12-48M ProPower's Golf Cart Battery Indicator Ezgo Yamaha Club Car 12, 24, 36, 48 VDC - Works on Trojan, Exide and all batteries Auto Ranging Battery Monitor - Connect to any fully charged lead acid battery system and the meter will select the proper range, for 12, 24, 36 or 48 Volt DC systems Works on all lead acid batteries as the meter can be set for one of two discharge curves found from different battery manufacturers. Curve 1 - Standard Lead Acid batteries have a discharge curve of 10.4 volts empty to 12.34 volts full (multiply by 2, 3 or 4 to get the range for 24, 36 or 48 volt systems). Cruve 2 - For newer designed "hot" acid batteries with a discharge curve of 11.5 volts empty to 12.7 volts full as found on Exide and Trojan deep cycle batteries (multiply by 2, 3 or 4 to get the range for 24, 36 or 48 volt systems). Internal Relay - can be wired for Normally Open or Normally closed operation - limited to 200 ma. Relay opens or closes (depending on how you wire it) when the display shows fully discharged - flashing red #1 and yellow #2 LEDs Can be used on forklifts, golf carts, solar sytems and any other battery powered equipment Water Proof from the front