

🌿 Stay effortlessly in control of your environment—indoors and out!
The U UNNI Indoor Outdoor Thermometer is a battery-powered wireless hygrometer featuring a Swiss-made Sensirion sensor for ultra-precise temperature (±0.5ºF) and humidity (±2%) readings. It transmits data up to 330 feet every 30 seconds using patented technology, supports up to 3 remote sensors, and offers a large, backlit touchscreen LCD for easy viewing of temperature, humidity, heat index, dew point, and mold index—perfect for professionals who demand accurate, real-time environmental monitoring.
| ASIN | B0DG8YGQ63 |
| Are Batteries Included | No |
| Batteries required | No |
| Best Sellers Rank | #137 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #8 in Indoor Thermometers |
| Brand | U UNNI |
| Color | Green |
| Connectivity Technology | WIRELESS |
| Customer Reviews | 4.4 4.4 out of 5 stars (8,991) |
| Display Type | Digital |
| Included Components | 1 x Hygrometer 1 x User Manual 1 x remote sensor, one-year warranty |
| Item Weight | 7.8 ounces |
| Item model number | UN0581G |
| Manufacturer | U UNNI |
| Package Dimensions | 5.71 x 5.71 x 1.46 inches |
| Power Source | Battery Powered |
| Sensor Technology | Wireless |
| Special Feature | HIGH-PRECISION |
| Style | Modern |
| Temperature Accuracy | 0.2778 °C |
| Upper Temperature Rating | 158 Degrees Fahrenheit |
K**N
Great buy!
Works well, accurate indoor and outdoor. East to install. Good product.
B**.
Beats the others price/set up, etc.
Extremely easy set up, smaller than I thought but still easy to read. So far no issues.
S**Y
Nice size, accurate info
The product seems to be working great so far. easy to set up and a nice compact size. Light is a nice feature in darker areas.
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.
S**N
Works well
I have this set up for my attic. The receiver isn't particularly close, but I still get good measurements. The fact that it lights up when you touch it is a bonus. There is a mounting hole on the back of the receiver, but I purchased some magnets, and I will use those to attach this to my refridgerator. The instructions are clear. This unit does NOT interfere with my other wireless thermometers made by a different brand.
B**M
Well worth the money.
Amazing little device so far. Will follow up. Two days later, it no longer works.
A**R
This is so fun!
We are a bit of weather nerds. So this has been fun. I purchased this just to play with. I’ve moved the monitors around different areas of the porch and rooms in my house. Pros, after a couple of days, it seems pretty accurate. The temperature’s agree with the outside temps on my weather apps and the inside temps agree with my thermostat. I just put batteries in and it was working. Very simple to get started. The back light with just a touch is wonderful and it only stays lit for a few seconds. I like that the light goes off quickly. The numbers are large and easy to read. I like that it’s light and portable. Con’s, it takes a couple of days to ‘settle in.’ I haven’t found any other cons. Especially for the price point, I love it. I may be purchasing an actual weather station soon!
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.
N**E
Excelente
A**A
Love this weather station. Needed. to replace an old one that was not reliable. This is a perfect size considering I don't have a lot of counter space. It is easy to read.
F**I
It works perfectly fine, even in very low temperatures. Very accurate and precise. The display visibility is excellent and the brightnes can be adjusted with a single button, which is convenient in the dead of night to not have to fiddle around controls.
M**R
Works as described. Easy to activate and change from F to C degrees.
R**.
Great for a peeps who walk in the morning, quick glance to know how to dress. Works well.
Trustpilot
1 week ago
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