Are you looking for a professional, yet hour timer? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? , ! Our professional hour timer must meet you needs. It is one of the for you. Features - Color: Black. - Material: ABS. - Size: About 5.3x3.2x3.2cm/ 2.08x1.26x1.26 inch. - Timing range: 0-999999H - Timing accuracy: 0.1H - Polar polarity: No polarity - Voltage range: DC4.5-60V - Waterproof rating: IP68 - Working temperature: -20 degree centigrade-65 degree centigrade - Non-resettable total to 999999 hours with 0.1 hour resolution. - Easy to install. LCD digital display. Show engine hours of operation. Complete waterproof. - Inductive hour meter for air compressor, water pump, cranes, etc. - After the product continuously detects the voltage signal for 1S, the timer starts timing. - The product designed with ABS casing resists water, shake. Package list: 1 x timer