This mechanical hour meter is specially designed for standard industrial engine maintenance, is widely used in engineering machinery, construction vehicles, farm machinery, generators, kilns, pumps, traffic, cranes, cars etc. the actual working hours of tracking and monitoring the performance of sophisticated equipment maintenance cycles to provide scientific basis. Features: Used to track the service life of engine.Low power consumption, long time to use.Completely sealed, dust-proof and damp-proof.Reliable performance, counter never loses.High accuracy, records and displays to 99,999.9 hours.Specifications: Model: HM001, HM002 (optional) Material: ABS Voltage: 6V-80V DC Power: 0.3W Indicator Range: 0-99999.9 hours Timing Precision: 0.01 Zero Resetting Device: No Operating Temperature: -10 - +50 Mechanical Vibration: 10-70Hz 1-8g Package Weight: approx. 53g Package Included: 1 x Hour Meter 2 x Terminal1Used to track the service life of engine 2Low power consumption, long time to use 3Completely sealed, dust-proof and damp-proof 4Reliable performance, counter never loses 5High accuracy, records and displays to 99,999.9 hours