Hour Meter Operating temperature: -10...+55 °C Counter input: 10...260 VAC/DC Dimensions: 48 x 24 x 50.7 mm Front panel cut-out: 45 x 22.2 mm Power supply, internal: Lithium battery (battery life 8 years) Backlight: Yes Display type: LCD Displays: 7-Digit Protection rating: IP65 (Front Panel) Termination type: Screw Terminal Character height: 8 mm Counting capacity: 100000 h