This is Learn Electronics Repair Youtube channels -1$ Short tracer

The case encloses 3 AA batteries and the PCB and 2x panel mount banana plug sockets

and some battery contacts

You can see the original version of the Short tracer on this video :

https://www.youtube.com/watch?v=P_2GGNr4q1s

And the UPDATED VERSION (which is the one available in this project) on this video

https://www.youtube.com/watch?v=0eixDdCpiO4

The case has a clip system that clips around your multimeter and makes it easier to do the measurements. You can then use 4 wire Kelvin probes with a standard Multimeter

The Short finder is extremely sensitive (20 microOhms) and very useful as demonstrated on the video. it can easily find a short circuit SMD capacitor in a row of adjacent capacitors millimeters apart. This is a great tool to have in your toolbox as a hobbyist and professional.

The case makes it easier to handle the short finder, you will also need a pair of Kelvin Probes