U UNNI UN0581 Wireless Indoor-Outdoor Thermometer Hygrometer

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Product guide

U UNNI UN0581 Wireless Indoor-Outdoor Thermometer Hygrometer

Indoor-Outdoor Thermometer Hygrometer: The U UNNI UN0581 wireless weather station measures indoor and outdoor temperature and humidity, with heat, dew point, and mold index readings. Its remote sensor, room-readable LCD, and brief button-activated backlight suit quick checks around the home, though customer feedback is mixed on accuracy and durability.

At a glance

Displays indoor and outdoor temperature and humidity, plus heat index, dew point index, and mold index for sensor locations.
Listing claims wireless data transmission within a 330 ft radius and updates every 30 seconds.
LCD backlight turns on with a button press and is stated to remain lit for 10 seconds.
Supports up to three sensors when set to different channels.

Price

$18.99Save 17%

Reference price: ~~$22.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

Combines temperature and humidity readings with heat, dew point, and mold indices on the display.
A remote sensor allows outdoor readings alongside indoor conditions without a wired connection.
Tabletop or wall-mountable placement and a touch-activated backlight support convenient spot checks.

Technical specifications

21 specifications

Identity
Brand	U UNNI
Model	UN0581

Display
Screen technology listed	LCD
Backlight duration	10 seconds

Sensors and readings
Sensor technology	Wireless
Indoor temperature range	+14.2ºF to +122ºF
Outdoor temperature range	-58º F to +158ºF
Indoor/outdoor humidity range	1% to 99%
Temperature accuracy claimed	+/-0.5ºF
Humidity accuracy claimed	+/-2%

Wireless and controls
Transmission range claimed	330 ft
Update interval claimed	every 30 seconds
Additional sensors supported	up to 3 sensors

Power and battery
Power configuration	Battery Powered
Battery requirement	3 AAA batteries required.

Dimensions and installation
Form factor	Rectangular
Weight listed	0.85 kg
Length	4.8 inches
Placement	tabletop or wall-mountable

Appearance
Color	White+Grey
Style	Compact

What to know before buying

Listing details to confirm

Listing specifications are not fully consistent: the details section gives temperature accuracy as 0.28 °C, while feature text claims +/-0.5ºF, and the battery requirement is three AAA batteries while the package information excludes batteries. Confirm the selected listing's accuracy and battery details before buying. The stated 330 ft range and 30-second interval are manufacturer claims, not independent measurements.

What’s in the box

HygrometerIncluded
User manualIncluded
Remote sensorIncluded
One-year warrantyCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Home, office, garden, or laboratory users who want local indoor and outdoor temperature and humidity readings.
Buyers who want heat, dew point, and mold index information on a compact display rather than app-based monitoring.

Less suited to

Anyone needing independently verified accuracy or reliability, given the mixed customer reports on readings and durability.
Buyers who need app alerts, data logging, or a continuously illuminated display, none of which is specified here.

U UNNI UN0581 Wireless Indoor-Outdoor Thermometer Hygrometer · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 10,739 ratings

5 stars73%73%
4 stars13%13%
3 stars4%4%
2 stars3%3%
1 star7%7%

Customer feedback commonly describes setup as easy and the display as clear and readable from across a room. Customers also praise the compact size and button-activated backlight. Reports on accuracy are mixed, with some finding readings reliable and others describing temperature readings as far off. Some customers report units stopped working within 10 months. These experiences matter for a station whose main purpose is local temperature and humidity monitoring, so buyers relying on precise readings or long service life should weigh the reported variability.

Positive themes

Customers describe setup as easy and the display as readable from across a room.
Customers appreciate the compact size and backlight that turns on when touched.

Negative themes

Some customers report units stopped working within 10 months.

Mixed feedback

Customers disagree about accuracy, with reports ranging from very accurate readings to temperature readings being far off.

Frequently asked questions

What does the U UNNI UN0581 measure?

The listing says it displays indoor and outdoor temperature and humidity, along with heat index, dew point index, and mold index readings.

How does the outdoor sensor communicate with the display?

It uses wireless transmission. The listing claims a range within a 330 ft radius and updates every 30 seconds, though actual performance is not independently verified.

Can the station use more than one sensor?

The listing says it supports up to three sensors, provided they are set to different channels.

Are batteries included?

The specifications require three AAA batteries, but the package information says the warranty excludes batteries. The supplied listing details therefore do not confirm that batteries are included.