https://www.amazon.com/gp/aw/d/B07R586J37?psc=1&ref=ppx_pop_mob_b_asin_titleOk, that's what I do for my other digital ones.
What kind of thermometers do you use?
Just trying to find a newer accurate one to use. My old Walmart ones are failing badly. I'm incubating a lot of valuable eggs this year so I'd like to get whatever the best reliable thermometer is.