Hour Meter Operating temperature: -10...+55 °C Counter input: Non-voltage, NPN 4.5...30 VDC Dimensions: 48 x 24 x 54 mm Display type: LCD Displays: 7-Digit Protection rating: IP66 (Front Panel) Termination type: Screw Terminal Character height: 8.7 mm Counting capacity: 999999.9 h