WHILE SUPPLY LASTS! ADI Digital Tachometer & Hour Meter for ROTAX 912/914 Series Engines. Four digit digital display of RPM, total engine hours and elapsed time. Programmable high RPM alarm & separate engine hours countdown for maintenance. Also recalls maximum RPM. Five levels of internal back lighting, operates on 9.5 - 33 VDC. 2.475" square and can be mounted from front or rear of the panel.