Operating Selection : Avaliable 2 sets of operating system(DSP1 & DSP2): full-featured and RPM monitoring only,which can be complied with different user’s haibit. Hours Useage Track : Keep track of total/trip run hours of gas engine, with ability to program a initial hours for new meter replacement,with ability to program a initial hours for new meter replacement, hours range: 0 to 999,999 hours with 1 MIN/0.1/1 hours resolution. Service Intervals : Schedule the periodic maintenance such as oil/air replacement by count-down timing,help you to know the time of due; maintenance timers range: 0 to 2000 hours. Idle Speed Adjustment : Monitor the engine current and highest RPM hit since the engine started,with various of engine firing patterns and RPM measurement range to adjust the idle speed status; RPM alert channel to warn the speed exceed; RPM measurement and alert range: 0 to 25000RPM. Others Easy to install it on any proper place by screw-on or stick-on; One wir