Tecknowledgey model 7001NTR-028 is a resettable Elapsed Time Indicator based on our 7001NT-028 DoD qualified ETI (M7793/14-1) that records the time that power has been applied for up to 99,999.99 hours. Requires a military part number M7793/12-1 hand held reader to be read. See Tecknowledgey's model 1170-007 hand held reader (sold separately).