Dogggy Digital Tachometer Inductive Pulse Speed Tachometer Digital Tach Hour Meter Tachometer Suitable for Chainsaws Lawn mowers Motorcycles

As the title says it does everything I need it to.Good for checking the speed of engines with a spark plug.A few things to note, it is permanently turned on there is no off switch and I haven't explored how to change the battery yet but I think it will be messy prysing it apart with a screwdriver.

Good product and good service