I have a tiny tach service monitor that reads out rpm's and hour meter and can also be reset. It is the more expensive one that is a mercury tach made by tiny tach for 4-stroke motors. the number on the back is 2074RX. I cant use this on my two-stroke and need another one which I have already ordered. I paid 75 bucks for this one and will part with it for 60.00 dollars (obo) as its only about 6-months old and has literally been sitting around my shop not being used. I put a total of 3 hours on it with my four stroke I used to have. This model is the quick silver model. If you are interested please PM me and I will answer ASAP. thank you.