DSO 150 Is a cheap mini oscilloscope from JYE TECH.
This conversion kit lets you the ability to convert it to Eruorack module and contains two parts:
This is an easy DIY project, just follow the Build guide (PDF File) I'll recommend to download it to your computer. (You can find the BOM in the build guide).
There is alternative firmware to DSO150 that add lots of new features, more info at: Open DSO 150
I checked few sources for the DSO150 kits, only the ones that come from Banggood was original 2017 version.
Other versions was less accurate and with a lots of ground noises. If you’re not buying the banggood version you need to find 2017 version and pay attention to (see picture):