What equipment does a selfie studio have? How to configure it?

There have been three generations of selfie photo studio equipment so far. The first generation is a SLR + mirror + photography system, and the second generation is a SLR + real-time display + photography system. The third generation is SLR + real-time display + instant display + wireless transmission + portable. The first and second generation selfie photo studios are now available in China, and many brands are making them. The first generation ones are the most numerous because the technology is simple and easy to master. The second generation is relatively less, accounting for about 20% of the total. The third-generation equipment is imported from the United States and is called takaphotoo selfie studio. So far, this is the only brand with third-generation selfie studio equipment.