I want to read the post mortem. How did they planted small explosives into small devices, how it was triggered.
Pretty simple really.
Plastic explosives has been around a long time. I could only guess what exists today.
GMRS radios (I'm assuming it was GMRS or something similar) are/can be mostly empty space.
Radios are open receivers, could easily send a signal that the hardware could trigger on, or have a timer to trigger on a certain date/time.
Just need access to the devices before shipping łor be able to intercept them).
From what I've heard : The devices were modified before they were sent to Lebanon , and American probably helped because Israel doesn't have this kind of technology used to explode them