PIC-121
Short Circuit Finder.
Tester change beep frequency depending on the resistance of the trace.
Allows you to detect short circuits between your signal traces.
Check out this link for more details and video demonstration.
http://www.pic-control.com/short-circuit-finder-pic-121/
Size about 150 x 50 x 30mm
Note:
A short USB-C cable is included in your purchase. (length is 300mm)
The USB 5V charger is sold separately. (You can use mobile phone charger to charge)