Based in part on the many stellar reviews by other people, I bought 2 of these devices. As soon as I received them, I put them side by side with each other and with another very accurate device for several days, making a written record of what each of these 2 units actually displayed as the ambient room temperature cycled up and down. The humidity on both units was always spot on, but unfortunately, these units are not capable of displaying temperature to the expected degree of accuracy. In more detail, as evidenced for example by this device's photo, the device can supposedly measure and display temperature in tenths of a degree. But in reality, it isn't designed to actually do this. For example, if room temperature were to increase very, very slowly by 3.0°F, from 77.0°F to 80.0°F, then each unit theoretically should successively display the following 31 values: 77.0, 77.1, 77.2, 77.3, 77.4, 77.5, 77.6, 77.7, 77.8, 77.9, 78.0, 78.1, 78.2, 78.3, 78.4, 78.5, 78.6, 78.7, 78.8, 78.9, 79.0, 79.1, 79.2, 79.3, 79.4, 79.5, 79.6, 79.7, 79.8, 79.9, & 80.0. In reality, however, from 77.0°F to 80.0°F, each unit is apparently designed to be capable of displaying only the following 8 values: 77.2, 77.4, 77.9, 78.3, 78.7, 79.0, 79.2 & 79.6. When the ambient temperature happened to be relatively stable at a point between 77.4 and 77.9, each unit would jump back and forth by 0.5° between 77.4 and 77.9, without ever showing any value in between. Likewise for 77.9 & 78.3, for 78.3 & 78.7, and for other similar temperature pairs. (My 2 units both very clearly exhibited exactly this same flaw, and each did so repeatedly, so it appears to be a generic design flaw, rather than just a single defective unit. And although for simplicity I discuss a particular 3.0° temperature range above, my 2 units both exhibited the same odd behavior through a wider temperature range). Aesthetically, this device is very attractive, and on paper it was exactly what I was looking for. But for a price approaching $25 per device, I expect this device to be capable of displaying temperature in tenths of a degree, and it can't. (I have other units that can, and do). So I reluctantly returned my 2 Thermor Bios devices to Amazon.
