Geevon Indoor Outdoor Thermometer Wireless with 3 Remote Sensors, Wireless Thermohygrometer, Digital Temperature Humidity Meter with Backlight, 200FT/60M Transmission

The accuracy is good and the precision is very good. The price is very low for instruments and so far the reliability is good. I have waited a month to review because time will be the final judge of your products value. To date, I am impressed by modern technology and capitalism. If your product continues to provide accurate data for years I will be a vocal advocate for it.

Easy-to-use device, well worth the price. It's fun and useful to quickly know the temperature at four different locations, which helps with more efficient passive solar: identifying which doors and windows to open.

Great for monitoring temperatures and humidity in multiple places at an outstanding price. My sensors have been in 130 and 20 degree environments and have functioned great battery life appears to be at least one year based on my use. The screen has a backlit function that works well and seems to conserve batteries. The display is ok - monochrome with ok clarity but nothing extraordinary. For the price, the readout is good.

I have only had this for about a week or so but so far it is working great! I really like it. The display is crystal clear and the remote units seem to work well. I have one outdoors, one in my attic and one in my basement. The one in the attic is about 75 feet away from the main unit, which is 3 floors below.

While it works great outside , it does not work in underground cellar with concrete walls or above ground in a metal storage unit, which is the entire reason I purchased it. It works via wi-fi, so it should have been a no-brainer, but for me, it wasn't. For those of us who may be a little tech-challenged at times, this information should be added to the description, etc.

Moisture readings aren't perfect, but good enough to do the job. I've had multiple water leaks in my crawl space and installed these sensors throughout the space after replacing a main hot water line. (The PEX-A was defective, so after the third leak I just replaced the entire line.) now I can monitor humidity levels in the crawl space without going down there. I don't think it's really accurate (but within 3-5%) which is close enough to let me know if there's a problem.

Guess good enough, I set them all close together and got temperature variation of ± 1° (F) and ± 2% humidity. I guess this is good enough and it is within the accuracy they claim in the description. I haven't had long enough to comment on resiliency in outdoor exposure.

This is a handy monitor system for my apartment. Easy setup. Just add batteries and set them around. I have one sensor for outside, one in the bathroom, and another in a grow tent. The base itself monitors room temperature where it sits. I am uncertain about the humidity accuracy because only the sensor for outside shows a different percentage. The indoor sensors humidity readings are all reading 20%. I cannot make sense of that.

Kinda useless without the "Backlit" option. Spend the extra $3 and get the backlit version! Nice accuracy though, With all 3 remote sensors sitting right next to the base unit for a half hour, all 4 temperatures agreed within 0.5 °F.

The first thing I did after installing my batteries (not included) was place these sensors side-by-side on my counter to test their accuracy. As you can see in the attached photo, despite being in the exact same environment, every single one gave a different reading. Don't waste your money on this brand—they are completely unreliable.