Gikfun Uno R3 R4 Case Transparent Clear Computer Box Compatible with Arduino UNO R3 R4 EK1655

You need a case if you're using an Uno, and this does the job. Protects the bottom of the board, prevents shortd and works well with shields.

These Unos can get scratched really quick so this case is perfect and also transparent as well.

It is better than other brands

First and foremost, let's get this out of the way: It's plastic. The reset button is a compliant mechanism that might wear down eventually, but that's okay.The quality of the surface finish is a smooth matte without severe concentric defects, and the assembly was remarkably easy­—I literally just dropped the Arduino in, put the top on, and it snapped together.It leaves only the ground shroud of the USB exposed, and covers the board well enough to prevent any fingerpoken.

The case is not nearly as see through as shown in photos which really decreases the use and purpose.

Simple design, easy installation, great device protection, all headers accessible for add-on shields.