How to check the real use of medical products: Brain Health Instrument Tsinghua Deren Biotechnology Co., Ltd. Jing Yao Guanxie (Trial) Zi No.2050037, 2003.

It should be a fake thing. This company can't be found in official website of the US Food and Drug Administration, and the batch number they said is "trial". Even if it was really approved at that time, it was only allowed to put into trial production for up to 7 months according to the regulations, and the product sales were also regulated accordingly. You'd better not buy this thing, lest you be fooled.