Lidl are offering on Thursday a "Multi-Purpose Detector" which "Detects
electricity up to 50mm, metal up to 30mm, wood up to 19mm, and cavities
up to 38mm deep". I stumbled over wood until I realised they mean using
it as a stud detector. But how pl. does it detect cavities?

PS
I did look for the manual but it couldn't find one for the model shown
in the photos.


--
Robin
reply-to address is (intended to be) valid