Vaikby Indoor Thermometer 4Pack, Humidity Gauge Meter Digital Hygrometer Room Thermometer for Home, Hight Accurate Temperature and Humidity Monitor for Greenhouse, Reptile, Humidors, Cellar, Office

My Vaikby thermometer/humidity meter did not come with instructions, whether an oversight or none of them do, I don't know. But they are very simple to use. Right out of the box they are ready to use. Just sit them in the rooms you want to monitor. I put them both in the same room the first day, side by side, to see if they gave the same reading.If they say 88º at first, and you know your house is only 77º according to your air conditioner thermostat, don't panic. Go away and let them alone. Come back half hour later, and they should read correctly. It takes them a while to get to the correct temperature, but then they remain accurate.If they aren't reading exactly the same as your house AC thermostat, keep in mind that different rooms in you house can be a slightly different temperature. In our house, the bedroom on the far side of the house from where the AC unit sits outside, is the "end of the line" (a long line) on the ductwork. And It is always slightly warmer than the other rooms. And I don't need a thermometer to tell me it's warmer.I put both thermometers in that room the first day and they both arrived at the same reading, slightly higher than the AC thermostat. When I put them in the same hallway as the AC thermostat, they arrived at the same reading except that these gave tenths of a degree.Sometimes they read exactly the same as each other when they are side by side in the same room, sometimes a tenth or two of a degree different, but that's close enough for me. My AC thermostat doesn't even give tenths of a degree. The humidity reads the same on both units.When the battery (common size CR 2032) needs changed, it is simple. Pry the back off the thermometer, but first notice how the back lines up with the unit - there is a same-size slit on both pieces. You will line these up when you put them back together. I went around with my fingernail to pry the back off, but a thin small knife point, in the tiny notch on the top side, would probably be wiser. The battery is installed face up (you can read the CR2032). Pop it out using a flat tiny screwdriver, or a knife point. Put the new battery in, face up, and snap the back on, lining the same-size slits up.These are very handy units and I may order a couple more for other rooms. I wanted them to monitor the humidity in our house, especially in the winter when it is sometimes cool enough outside to open windows. (We live in a hot, high humidity state.)I did contact the seller, TXJT Direct, and received a prompt and helpful response. It is nice to deal with a company that gives good customer support if you need it.

I have greenhouse cabinets and Ikea plant shelves all over my house for my 300+ houseplants and I've bought tons of humidity meters to keep track of my humidity levels. These are among my favorites. They are big without being too large, easy to read, and I've found that they all measure within a percent or two of one another when placed in the same area.

These little thermometers are cute, accurate and inexpensive. Medicine bottle is just for size reference of the thermometers. Box of 2

I installed one of these thermostats in both my basement and my shed. The basement unit is performing well, and I’m impressed by the amount of information this small device displays. I compared it to a T5 Honeywell thermostat, and it shows the same temperature, which is surprising given the price difference. Despite the high temperatures in my shed, reaching up to 105°F, the thermostat continues to work perfectly. The white color also adds a nice touch.

First, not sure why people are saying it's small. One of the pictures, on the product page, shows an egg in comparison in regards to its size. But moving on from that.This is small and accurate from what I can tell so long as you don't put it near vents or in direct sunlight. I'm not sure on the accuracy on regards to the humidity reader but I mainly got it to read the temperature between outside, the garage, and the attic I'm working on to insulate to try to keep the heat out in the summer and heat inside in the winter. So, I wasn't worried on testing that out.But today, the strangest thing happened. When I was passing by to read the temperature on the one that was outside, I noticed that it was in Celsius. That was odd. I didn't touch it nor did it move from the spot I placed it in. So, out of curiosity I took it inside to try and figure it out. I took the whole thing apart, 3 layers in total, which wasn't hard to do. I could basically use my medium bendable nails to open it so long as I used the corners. It was so much easier doing it like that since if I did that from the sides, I would bend my nails to the point it rips. But back to the subject on hand... Taking it apart, I couldn't exactly figure it out since when it came to actual wires and circuit board, I am completely stumped die to being a novice. So, with no way to findthe reason why, from doing it this way, I snapped it back together. When putting it completely together it seemed to have resetted the thermometer back to Fahrenheit.I messaged the seller in regards to this and not only were they polite but they were wish quick to reply. They even offered to send another pack in regards to what happened but it was fine. I was simply curious. Still am but maybe I'll eventually figure it out or forget until if it possibly does it again. But, still. To offer to do that really spoke out loudly to me.Also the price is amazing for what you're getting in my opinion

Way too small and numbers are not very visible

Good little thermometer. Needed one for the garage. Works well.

These are really handy little thermometers. We keep one in the living room, garage, patio and cellar. Easy to read and accurate as far as I can tell.

Buen producto ideal en invierno para medir humedad dentro de las habitacionesFunciona bien, buen precio y calidad

Mide muy bien y es muy discreto y barato.

Perfect minimal and to the point product .. battery is reliable \ long lastingLooks techy and futurestic !

Compré este producto para utilizarlo en un cultivo indoor. Esperaba que fueran un poco más grandes, pero está bien por el precio. Parecen funcionar bien y la diferencia entre lo que uno marca y el otro es mínima.Si pudiera destacar algo es que no tiene botón de encendido y apagado. Falta ver cuánto dura la batería estando encendido todo el tiempo. Actualizo mi calificación conforme los pruebe.

Están pequeños, el único problema es que solo dan la lectura en grados faranheim y no en centígrados y no hay forma de cambiar eso.