Product Name: Generator Quartz Mechanical Hour Timer for Truck Excavator Mechanical Counter 12-36V Model NO.: ZC748 Mechanism: Quartz Carry base: Module-n Synchronous Counter Carry Mode: Synchronous Counter Theory: Mechanical Function: Addition Counter, Reversible Counter, Subtract Counter Usage: Timer Switch, Multifunctional, Time Counter, Industrial, Electromagnetic Counter, Kitchen, Summation Meter, Universal Counter Type: Counter Voltage: DC 12-36V AC100-250V Display Range: 0-99999h60m Timing Precision: +/- 0.01 Zero-Resetting Device: No-Zero Temperature Range: -10