error Notes on disposal of spent batteries The new C1 operating hours counter does not need any cable connection. By a piezo element it detects the vibration of the engine and starts the recording. The waterproof case to IP68 guarantees the function even under the most adverse conditions. 2 integrated meters are characterized on the one hand for the entire duration, on the other hand, a second clock are posited by pressing a button back. The installation on the vehicle by the mitglieferte tape is done easily and with little effort. The integrated battery guarantees a term of 3 years.