Another ADE 651? https://en.wikipedia.org/wiki/ADE_651
Promotional material issued by ATSC claimed that the ADE 651 could detect such item as guns, ammunition, drugs, truffles, human bodies, contraband ivory and bank notes at distances of up to 1 kilometre (0.62 mi), underground, through walls, underwater or even from aircraft at an altitude of up to 5 kilometres (3.1 mi).[12] In a promotional video, McCormick claimed that the device could detect elephants from 48 kilometres (30 mi) away.[13]