Review on Vibration Activated Waterproof Hourmeter Motorcycle by Jon Higdem

I have a new inverter generator and wanted to keep track of the hours so I can keep track of oil changes etc. I've looked at a lot of these vibration meters and wasn't sure how accurate they are. I have to say I'm pleasantly surprised. I attached it with 3M q2-sided tape and ran the generator for an hour first. The hour meter was less than a minute behind my stopwatch. I changed the oil etc and drove another hour. This time it was less than 30 seconds. I followed the instructions and installed it exactly - so I think that's the best it can do - which suits my purposes. For the price and ease of use, you can't do better in my opinion. If you want ultra accurate and accurate timekeeping, spend more and buy a wired hour meter.