. Description:HM-1 series quartz electronic hermetic clock has novel structure, dexterity, high precision, stable and reliable performance, long service life, wide environmental adaptability, low price and convenient use. It is most suitable for industrial standard time, widely used in engineering machinery, engineering vehicles, agricultural machinery, generators, air compressors, pumps, driving, cranes, various types of vehicles, etc. The cumulative actual operating time, charging and monitoring, monitoring of precision equipment, evaluation and maintenance cycle provides a scientific basis. Features:Color: Black, White Material: Plastic Size: 7.2cm(2.83in) × 7.2cm(2.83in) × 4.1cm(1.61in)Time Range: 0 - 99999.99 Hours Voltage Specifications: AC24V, AC110V, AC220V - 240V, 50Hz/60Hz Timing Accuracy: ± 0.01 Power: 0.3W Working Temperature: -10°C - 50°C Relative Ability: Fully Sealed Quantity: 1pcNote: Please allow 1-3cm error due to manual measurement. Make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Included:1 ×Hour Meter