has been discontinued, it is certainly less and less used, plus R2R continues to be touted, and the natural price has risen. In fact, it is also very interesting to say that in the era of 1704, some people miss 1541, and in the era of 1792, they began to miss 1704. Any era of high-end chips can make first-class classic products, do not have to be too entangled with what DA chip, money spent in place, things will not be bad, and low-end emphasis on decoding chips and the like, nothing more than an advertising campaign!