Photos: What is the Raspberry Pi 4 Model B? A closer look at the new board and what it can do

On the back

The underside of the Pi 4 is more bare than previous boards, housing only the microSD card reader. 

SEE: Raspberry Pi 4 Model B review: This board can really replace your PC

By Nick Heath

Nick Heath is a computer science student and was formerly a journalist at TechRepublic and ZDNet.