Review on 🌡️ 4 Pack of Ambient Weather WS-03-4 Compact Indoor Temperature and Humidity Monitors by Christopher Gulledge

Positive or negative deviations can be annoying until you understand why they occur. I bought a pack of four, batteries were not included, put my different ages in it, then put all four in an empty tissue box and covered. On the way to the crate, I noticed that both were already close in temperature and humidity, the difference was no more than +/-2. An hour later the temperature was still very close. After a few days, all four are +/-1 in the 51% range. I have no idea how accurate that is, but they show a very similar number in 4 rooms. My rooms have individual electric radiators built into the wall with a dial and no temperature controls, a recess about 3/4 of the way down. I'm trying to get a low temp around 68 which is below the dimple. All four work great for me.