SEARON LED Battery Indicator Charge Status Power Monitor Meter Gauge Golf Cart Club Car EZGO LED battery Indicator works on 36 Volt Lead-acid batteries to monitor the charge/discharge status of your batteries. The batteries voltage is displayed using a 10 segment LED bar graph(1 Red, 2 Yellow and 7 Green LEDs) display from full to empty. At a 90% battery discharge, the red and yellow LEDs will alternately flash to indicate a very low voltage capacity is remining. Once battery was fully charged, Meter will cycle through for continuous 6 minutes then stay "full" position. CE & RoHS Certification and Warrant 1 Year