On the product:
PH acidity meter combined thermometer with digital display with automatic temperature correction (ATC)

Allows measurement of acidity level in pools, aquariums, wine, food and more. Easy and convenient to use – quick reading with one click of a button

main features:

An accurate PH acidity meter with a measurement level of 0.0 to 14.0
Reading error: 0.1ph
Temperature measurement in the range 0-50 degrees Celsius
Temp measurement resolution 0.1 degree
Easy and convenient to carry anywhere and fit in a pocket
Excellent for owners of pools, aquariums, making wine, fermenting sauces and more
Comes calibrated
ATC auto correction system
Has a comfortable and large LCD screen for clear reading
Precise glass electrode
Accuracy level of 0.1 and display resolution of 0.1
Working temperature range 0~60 degrees Celsius
Works on 3 LR44 batteries (included in the package)
Weight: 82 grams
Dimensions: 188X38 mm
Included in the package:

Acidity meter for measuring PH value
2 solutions for calibration
3 LR44 batteries