Has anyone had this long enough to know if the battery will last at least one year?

I've had mine for over a year and it's still going... I've had other battery powered products from a seller and the batteries lasted only a few weeks... It's because the batteries have been installed in that device since the assembly line...If by chance they don't put the little plastic strip between the negative side and the device, the batteries will go bad...

Any way to calibrate temperature?

Calibrate means that you adjust your measuring tool (e.g. thermometer, hygrometer, speedometer, etc.) to give a known value when it's measuring (detecting) that value; you usually do this by adjusting a screw or other mechanism that results in the unit showing a 'reading', or measurement, of that known value on its display or output. This unit does NOT have any calibration adjustment.

What do the low and high represent...is it for the last 24 hours?

As several others have said, it's the HIGH & LOW since it was reset. To reset, HOLD the button marked F/C until it resets. Each time that button is pressed, the displayed temperature changes between Fahrenheit and Celsius.

In China. I bought 3 of them, but don't find them useful. The setting for humid, dry, comfort is inaccurate for a relativity level reading in a home environment. At least in the Midwest region. They say 49% is dry when in fact it's too much for a home to carry, at least in the winter colder temps.

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TempPro TempAir Digital Hygrometer Indoor Thermometer Room Thermometer | Humidity Meter Humidity Gauge with Temperature Humidity Monitor for House Office Celler Kitchen Greenhouse RV, 2 Pack

Product ID: 138292020

Details

Battery Description
Alkaline
Brand
TempPro
Color
White
Item Weight
2.72 ounces
Product Dimensions
2.6"W x 3.1"H

💧±2-3% RH precision

⏱️10-sec refresh rate

🌡️±1°F accuracy

€ 42.26

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Description

🌿 Stay in the comfort zone—know your air, own your space!

HEALTH HOME WELLNESS - Maintain ideal humidity levels to protect skin, reduce allergens, and preserve valuables like cigars or plants.
PRECISION YOU CAN TRUST - Get ultra-accurate temperature and humidity readings with ±1°F and ±2-3% RH—perfect for your home, office, or greenhouse.
TRACK YOUR CLIMATE HISTORY - High/low records let you compare past conditions and optimize your space for health and comfort.
VERSATILE PLACEMENT OPTIONS - Magnetic back and tabletop stand give you flexible, stylish placement anywhere—from fridge to office desk.
REAL TIME ENVIRONMENT INSIGHTS - Updates every 10 seconds so you never miss a shift in air quality—stay ahead of dryness or dampness effortlessly.

The TempPro TempAir Digital Hygrometer is a dual-pack indoor thermometer and humidity monitor delivering precise ±1°F temperature and ±2-3% relative humidity readings. With a rapid 10-second refresh rate and high/low record tracking, it ensures you’re always informed about your environment’s wellness. Designed for versatile use with magnetic and tabletop mounting, it’s ideal for homes, offices, greenhouses, and more—helping you maintain optimal air quality for health, comfort, and preservation.

Specifications

ASIN	B07R3YC1BC
Battery Description	Alkaline
Best Sellers Rank	#40 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1 in Weather Hygrometers #1 in Indoor Thermometers
Brand Name	TempPro
Color	White
Customer Reviews	4.6 4.6 out of 5 stars (154,864)
Included Components	Temperature and Humidity Monitor,AAA battery,User Manual
Item Dimensions W x H	2.6"W x 3.1"H
Item Length	2.62 inches
Item Weight	2.72 ounces
Manufacturer	TempPro
Model	TempAir CORE TP-50-2
Mounting Type	Tabletop
Number of Items	2
Operating Humidity	10% ~ 99%
Part Number	TP50-2
Temperature Accuracy	±1 °F
Temperature Reading Accuracy	plus_minus_1_degree_fahrenheit
Unit Count	2 Count
Upper Temperature Range	158 °F
Voltage	3 volts

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 42.26

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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