Mini OLED AmmeterMonitors essential electrical system parameters on a bright, waterproof, daylight readable OLED screenCompact size enables mounting in any convenient locationReverse polarity protectedMounts in a common 1-1/8″ holeConvenient amperage monitoringMonitors -100A to 100A DCPositive or negative side wiringSpecifications:Meter: AmmeterNominal Voltage: 12V DC / 24V DCResolution: 0.1AIntermittent Rating: 110ACranking Rating 30 sec: 175AAccuracy: 2%Input Voltage Range: 8-36V DCOperating Current: 15mAWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Quick Guide (pdf)