Runleader RL-HM016B Self Powered Digital Hour Meter, Vibration Activated, Contains hour meter, resettable job timer ,Lock function Shutdown function and waterproof design(2-year warranty) Product Features:1 Hour Meter (TOT) Features---- Help you track how many hours you put on your machine. ■ When equipment vibrates, display shows total run time of machine ■ Show auto sleep to save power,press the button to view; Data is saved when the screen is closed ■Total Hours reading displays from 0 to 99,999 Hours, 0.1 hour accuracy ■TOT hours are non-resettable. 2 JOB timer (PAR) Features---- Used to measure the time of a particular work job, such as change oil ■ By operating the button display shows JOB run time of engine ■JOB timer reading displays from 0 to 99,999 Hours, 0.1 hour accuracy ■JOB timer is resettable 3 Programmable vibration sensitivity---- Used to accurately sense the vibration frequency of different machines during operation. ■ Contains two vibration sensitivity options: LO (low) / HI (high) ■ LO (low) suitable for equipment with low vibration, Its vibration frequency is greater than 32 Hz ■ HI (high) suitable for equipment with high vibration, Its vibration frequency is greater than 4 Hz ■ Two sensitivities can also be selected for use on the same machine to obtain accurate timing data 4 Other Features■ Internal CR2032 battery , Battery life is up to 5 years ■ Hour meter contains lock function to prevent time usage during transport ■ Operation button can be turned off , Data retained after shutdown ■ LCD Screen size 25mm×13mm ■There is no need for cables, and the product relies on machine vibration to accumulate equipment hours. ■ Easy to install, including Double-sided tape, Instruction manual.