Operating hours counter ? Sum from 0:00-999:59 h:min ? Battery life approx. 20 h ? Dimensions: 44 x 61 x 12 mm. This model is an hour meter that displays the cumulative time when activated by the electrical impulses generated by gasoline engines at the time of ignition. It can be used to schedule regular inspection and regular maintenance of the engine. Antenna connection cable included. CODE: ORIGINAL CODE: CZ