Nihon Dobutsu Yakuhin Nichido Multi pH Meter with Calibration Solution

This is the Multi pH Meter from Nichido, a Japanese animal product brand.
I purchased it but never had the chance to use it, so it's completely unused. It has been stored away.

*Price is firm, no returns, immediate purchase is welcome.

Below is the product description from the manufacturer's website.
Please refer to it before purchasing.

Nichido High-Performance pH Meter

▼Features
Waterproof
This waterproof model is safe even if water splashes on it.
It can measure pH from 0 to 14.0, allowing you to measure a wide range of water quality from freshwater to saltwater.

Measurement Speed
The sensor responds quickly, displaying measurement results digitally in real-time.
*Varies depending on the measurement environment.

High Accuracy
Regular calibration (numerical checks) is essential for accurate pH measurement.
To maintain high accuracy, a 2-point calibration is performed at pH 4.0 and pH 7.0.

Replaceable Sensor
The sensor unit (sold separately) can be replaced.

Warning
This product is for ornamental fish use only. Do not use for any other purpose.
This product is not fully waterproof. Using it with the sensor part submerged in water or
if water pressure is applied due to submersion may cause malfunction.
Do not leave it exposed to direct sunlight or environments with humidity other than the intended use environment.

Precautions for Use
If there is a sudden change in pH, it will take some time for the display to show the correct value.
Specifications are subject to change without notice for product improvement. Please understand.
Please read the instruction manual carefully and use the product correctly.

▼Product Specifications
Measurement Range
0-14.0 pH
Resolution
0.1 pH
Measurement Accuracy
±0.2 pH
Operating Environment
0℃ to 50℃, 80% RH or less (no condensation)
Dimensions/Weight
Φ37.5 x H170mm / Approx. 87g
Power Source
2 x CR2032 lithium batteries
Accessories
Instruction Manual, pH Calibration Solutions (4.0, 7.0), Storage Solution
Calibration Screwdriver
Optional
Replacement Sensor (sold separately)