SH series of quartz-enclosed electronic hour meter, timer innovative structure, size, high accuracy, reliable performance, long life and adapt to the environment - and lowprices, user-friendly. It is most appropriate for Standard Industrial timing, is widely used in engineering machinery, construction vehicles, farm machinery, generators, kilns, pumps, traffic, cranes, cars and other types of fees and the actualworking hours of tracking and monitoring the performance of sophisticated equipment maintenance cycles to provide scientific basis. Technical parameters:Timing range 9999.59 99999.9 Accumulated timing precision + or -0.01 Use of environmental temperature -10C--+50CPowder 0.3W In Zhen range 10-70HZ 1-8g Relative Humidity All sealed Returntozero no Power voltage 6----80V 90---130V 180---240V (The DC generic)