18 – 32 Volt DC Analog Panel MeterProduct Details:Direct Read, 24 Volt DC Battery Monitor MeterRange: 18-32 Volt DC with 250 mV DivisionsMeter Input: Screw TerminalsLinear ScaleScale Arc: 100 DegreeAccuracy: Plus or Minus 2% Full ScalePanel Meter Mounts in ~2.1″ Diameter Cut-Out.Dimensions: ~3″ (W) x 2.3″ (H) x Overall Depth: 2.25″Mounting Studs are 1.875″ Center to CenterBocatech, IncBTMT3-18-32VDC