Automotive Authority LLC&reg; 72 Volt / 72V Polaris GEM Electric Vehicle Battery Meter Gauge Charger Indicator Rectangle 72 Volt Battery Indicator with Hour Meter Gauge Tri-color Operating Voltage: 72 Volt Range: 73.95 Volt Full - 62.28 Volt Empty Never let your electric equipment run out of power again. This battery indicator is specifically designed for battery powered equipment to monitor the charge status of the batteries charge. Installation Instructions Provided in the Product Description