【Junk Item】 Digital Desk Clock - Big Display Clock

【Junk Item】Digital Desk Clock with Thermometer and Alarm Function
Received as a gift.
Upon opening the box, I found an instruction manual that was different from the product.
I inserted batteries but couldn't figure out how to use it.
Using generative AI, I researched how to use it, and was able to set the time, but after a while, it would revert to the initial time. I also couldn't figure out how to set the other functions.
I believe it is likely usable as a clock, but for safety, it is being sold as a junk item.
Amazon Price: ¥1100
For use as parts, or after repair/setup.
As this is a junk item, it is sold to those who understand and agree to No Claim, No Return (NCNR).