Latest model inclinometer with laser, IP54 waterproof, junk

Product Description
From the shop where it was purchased:
This is a digital protractor that supports a measurement range of 4x90°.
- Capable of measuring absolute angle, relative angle, and inclination.
- Built-in magnets on all four sides of the main unit allow for secure attachment to metal surfaces.
- Features a built-in rechargeable USB battery and an auto power-off function.

How to Operate:
Press the ON/OFF button once for absolute angle (calibrated to the factory standard).
Press the ON/OFF button repeatedly to switch laser projection modes:
Left → Right → Both Sides → Off → Right → Left → Both Sides → Off
Press and hold the ON/OFF button to turn off the power.
Press the ZERO button to reset the reference (relative angle).
Press HOLD to fix the display.

Thank you for looking.

Although I purchased this item, I am listing it as a junk item because I noticed unstable operation during test use.
(Since the warranty period from the store has expired, I could not return it.)

Please refer to the screenshots of the product page images from when I purchased it for the main specifications and functions.

Although it is a new and unused item, it has been test-used for operation confirmation.

The symptoms I confirmed are as follows:

- The ON/OFF button is unresponsive, and the laser mode does not switch with a single press. (It works after pressing the ON/OFF button a few times.)
- Even when turned off by holding the button, the display may reappear. (It turns off after repeating a few times. *Individual differences may apply.)
- After automatic power-off, it may not turn on with a single press when powered on again. (It works after pressing a few times.)
- The magnetic adhesion strength varies depending on the material and paint condition of the installation surface.

Regarding the digital display and laser accuracy, I did not notice any issues visually, but since it has not been used in actual work, accuracy cannot be guaranteed.

Due to the above conditions, please consider this item for repair/adjustment, or for parts or research purposes.

I purchased a large quantity, so bulk purchases are also welcome. We offer a 5% discount for purchases of 2 or more items.

As this is treated as a junk item, please refrain from returns or complaints.

[Condition]
New, unused (opened for photography and test use)

[Set Contents]
All items shown in the product images are included.
The instruction manual was in English.
*The method for zero correction will be added in the comments section.

[Packaging]
To offer the lowest possible price, the item will be shipped without its outer box, with simple packaging such as bubble wrap or an OPP bag.

Please understand this in advance.