Most of them are imitations, and the quality is not guaranteed.
Find some big brands, such as Jiyitang, Ding Dong and Jinyutang, which are all good.
Check the compass after you receive it. Don't rush to confirm. Please contact the seller if you have any questions.
Looking for the compass of Jiyitang. Good quality and high cost performance. I have already bought two, and I'm going to buy another one.
I hope I can help you.