trigger
Old Ironsides
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Lifetime Member
Supporting Member
It doesn't shut off. If you hit display the back light will come on for a minute and then go out but the numerical display stays on. Put mine on over a year ago and just replaced the battery a couple weeks ago. Noticed the back light would come on every few minutes on its own, guess that means time to replace. I know, the instructions suck but I don't ever touch mine anyway, just reads rpm's.