There is another unit with a blue sticker. It has two plugs, both for heating (instead of this one, which has one for cooling). In practice it shouldn't matter as it's just a plug, but I went with the blue one. They seem reliable enough. if you are concerned about absolute accuracy, you appear to be able to adjust to within 1 deg accuracy or trigger.
yep inkbirds are pretty accurate honestly, i have a digital thermometer, glass thermometer, and my sicce xstream also has a temperature probe and it has always matched the inkbird. 1 degree fluctuations are a bit annoying though, but its cheap
If you are set on that one which does heating and cooling, Inkbird also sells the same model but with a different temp probe specifically for aquariums.