Please provide information about the FT891 spectrum.

听说FT891有内置频谱，但是网上资料太少，不知效果如何，来说一下（最好加图片）

It's passable and allows you to get a general idea. It's quite limited and basic, but better than nothing. You can find videos on Bilibili.

It has a spectrum chart, but no waterfall chart, and it's different from the previous one.

It would be best to include some actual usage images.

浩奇科技（厦门）有限公司

是无线电，把我们联系在一起