The devices are about the size of a PDA, screwed into the car’s front window.
People in Hong Kong, in particular criminals, began to notice something was awry when the authorities were able to pick out cars carrying illegal goods across borders without problem or hesitation.
"For every ten cars we ran we only had [smuggled goods] in three or four to reduce the risk, but the border agents caught all of them. The accuracy was unreal!" one smuggler told Apple Daily.
Zheng Liming, an Associate Professor of Electrical Engineering at City University in Hong Kong, took a look at the listening device and determined that it was indeed an eavesdropping device. (more)
