This unit is an attractive 3 hole round flange panel mount hour meter. Specifications include: Time Scale: 5-digits; Operating Voltage: 10–80 V DC; Power: .03 watts @ 12 V DC/.70 watts @ 48 V DC; Size: 1.68W x 1.68H x 1.26D Inch; Face Dia. 2.31 Inch; Weight 2 oz.; 1/4" Male Blade Terminals; Vibration Resistant; Accurate; 3 Hole Flange Bezel with Retaining Ring; and Warranty: 10,000 hrs / 3 yrs.