From Korg:
We recently achieved a milestone — over 20 million tuners sold worldwide. To mark the occasion, we have increased the warranty on all of our tuners and metronomes sold to three years. Now you can stay perfectly in tune with the latest in Korg tuner technology, backed by the high quality of these products plus years of guaranteed performance
I’ve never owned a Korg tuner. I do have a Korg M1 though…..