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🌦️ Stay ahead of the weather curve—because your comfort deserves precision.
This wireless indoor/outdoor thermometer and hygrometer features a high-precision Swiss Sensirion sensor with ±0.5ºF temperature accuracy and ±2% humidity accuracy. It transmits data wirelessly up to 330 feet every 30 seconds, supports up to 3 remote sensors, and displays comprehensive climate metrics including heat index, dew point, and mold index on a clear backlit LCD. Battery powered and compact, it’s designed for easy installation and reliable, real-time environmental monitoring.






| ASIN | B09FSYJZSH |
| Additional Features | HIGH-PRECISION |
| Are batteries included? | No |
| Best Sellers Rank | #2,554 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #13 in Indoor Thermometers |
| Brand | U UNNI |
| Brand Name | U UNNI |
| Color | White+Grey |
| Connectivity Technology | WIRELESS |
| Customer Reviews | 4.4 out of 5 stars 9,732 Reviews |
| Display Type | LCD |
| Included Components | 1 x Hygrometer 1 x User Manual 1 x remote sensor, one-year warranty |
| Item Length | 4.8 Inches |
| Item Weight | 0.85 Kilograms |
| Manufacturer | U UNNI |
| Model | UN0581 |
| Number of Batteries | 3 AAA batteries required. |
| Part Number | UN0581 |
| Power Source | Battery Powered, Not Included |
| Recommended Uses For Product | Garden, Home, Office, Laboratory |
| Sensor Technology | Wireless |
| Shape | Rectangular |
| Special Feature | HIGH-PRECISION |
| Specific Uses For Product | heat index , dew point index and mold index |
| Style Name | Compact |
| Temperature Accuracy | 0.28 °C |
| Unit Count | 1 Count |
| Upper Temperature Range | 158 Degrees Fahrenheit |
D**H
Works great!
This has a nice big display and so easy to use. It’s very accurate too! This is a great value.
M**H
Easy to use, attractive, and full of features
This thermometer was super easy to install, and the design of the remote sensor makes it resistant to moisture. The display is easy to read and provides a lot of information. I particularly appreciate the mold probability to help me manage allergies. The product is very attractive as well.
M**E
I like it.
It appears to be well made and sturdy. The sensor is much sturdier than others I've used in the past. I hung mine on a nail and it hangs flat against the wall nicely. The casing at the point of contact with the nail is 5/8" deep so I have no concerns about it breaking there. My first location of the sensor eventually became drenched in late afternoon/early evening sunshine and the temperature sensed was most definitely affected by this, but that's not a bad thing really as it showed me that the sensor is sensitive enough to register the sunshines effect. I did relocate the sensor though as I want an accurate air temperature reading without the suns effect. The accuracy seems to be good. Compared to other thermometers I have around the house it consistently measure +/- 2°. I've also compared it's reading to the NWS published temperatures for my location and again it stays within the +/-2° sometimes 3° range. Very acceptable to me. The display unit is also sturdy and well made. It displays both indoor and outdoor temps and keeps the min and max for the day. I set mine to display heat index but dew point and a mold indicator are also available. The backlight button is easily accessible and is at the point of contact from where the unit hangs so I'm not constantly knocking the thing off the wall. Excellent design there I would say. The display unit is heavy enough that it hangs well and probably wouldn't be easy to brush off the screw or nail it hangs from if you had it in a location that that could happen. It also has a pull out stand on the back for setting it on a table or any flat surface, which also seems to work well. I had no problems with the instructions and had the batteries inserted and the settings set within just a few minutes. Quite easy actually. I like this thermometer and am very pleased with it. I can't speak to power usage and battery drain at this point as I've only had it for a short time, but I might add that information after I've used it for a bit. Overall I'm very happy with my purchase. Update: December 24, 2025 Well, I've had the thermometer for a year. It's still working with no complaints. Original batteries still installed. Accuracy is the same. I'm still happy with my purchase.
R**0
A nice remote thermometer but it is not waterproof
The wireless indoor/outdoor thermometer/hygrometer works well but it has two minor issues. According to the instructions, you need to place the remote sensor at a location that is protected from rain, which limits the sensor's possible locations. Also, the feature that tries to predict future weather using a barometer that senses changes in air pressure is not very helpful. However, as near as I can tell the indoor and outdoor temperatures are accurate, as is the hydrometer. One feature that I really appreciate is that lightly touching the top of the device will light it up for a few seconds making it easy to read in low light conditions. So accuracy is good and that is what really counts. But properly locating the remote sensor so that it will not be affected by rain, while it remains fully exposed to the outdoor temperature without being exposed to full sunshine during the day, can be a head scratcher.
T**M
Great
It is wonderful it is so big we can see it very well. Easy installation no problem kicked right in. And it's very accurate and the temperature and the other gauges thank you very much I would recommend this 800% husband and I are very happy with it
J**N
Quality product, responsive customer service
Having purchased several similar products over the years, we are particularly pleased with the image size, brightness and clarity of the display. The display is mounted on the mirror wall of the master bathroom to provide information useful for how to dress for the day. Our primary interest is in the remote sensed outdoor temperature, which has proven to be quite accurate. The additional information is a bonus that we rarely use. Importantly, following a particularly windy rain storm, the display data became distorted. The supplier was contacted using the address printed on the unit. After an exchange of more detailed information, I received a replacement remote sensor. Performance is like new again. Very pleased with the product and customer support.
P**R
Works as described
Have had this same digital thermometer In the past. Works great. Battery compartment in remote got wet and froze.
G**E
Really Nice Thermometer
I really am happy with this indoor/outdoor thermometer. It's very affordable and easy to set up. I read some reviews which criticized its accuracy. After several weeks of comparisons with my phone apps and other thermometers which we have around the house I'm finding this device to be within acceptable variances.
N**E
Muy bueno
Excelente
J**S
An excellent product
Just what I wanted. It does what I require.
K**N
Easy peasy
easy set up and seems to work well
A**N
Works!
Took a few tries to get it working, patience is the key!
A**T
qualité/prix
La lecture est plus difficile lorsque pas alumé
Trustpilot
2 weeks ago
2 weeks ago