Product review (1 stars): they don't waste the earths resources on putrid junk
don't ever buy these things. you can line up 10 of them side by side and none of them will agree. they are cheap and if someone wanted  to know an approx time temp and humidly buy a bunch. under $10 what a bargain. however i just spent $20 for two and they line up with each other. imagine that. two different manufacturers too. i am going there today buy another couple for $20 why because they work right that's why. they don't waste the earths resources on putrid junk. i got a huge problem with that kind of waste.