Tiny TACH - Handheld Fast Tach Wireless Tachometer - DTI-FT100

Works like it shoud.

It functions well I don't know how true it is tho if I set a saw where the manual says it's supposed to run it sounds was more lean than it should

This one has all the features, does 1 and 2 cylinder engines, 2 and 4 cycle plus it has a max rpm recall as well! Replaceable battery, it’s pretty great!!!