The Honeywell 85392-12 Quartz Plus dc Hour Meter is a robust and reliable device designed for accurate timekeeping in a wide range of applications. Featuring a rectangle opening and a two-screw flange mounting, it offers versatile installation options. The meter operates on a voltage of 12-60 Vdc and can measure up to 10,000 hours, making it suitable for demanding environments. Its custom CMOS integrated circuit indicates operating time in hours and tenths, and includes a running indicator. Common applications include lawn tractors, farm equipment, construction equipment, utility vehicles, recreational vehicles, golf carts, aircraft, medical equipment, and office equipment.