i watched the news....not only dat it can detect ur notebook...they will even try to unlock ur car...they try to read ur alarm wireless signal n then ur car will unlock itself...the size of the detector will b as small as pen...

more hitech one would b able to determine either its notebook or digital camera...

well dats wat i saw in tv3 8pm news....last monday nite...

on the other hand, my lecturer own this stuff...n he said it detect ur wifi signal...even u edy shutdown ur notebook, ur wifi still emit small signal...better way is to remove the battery from ur notebook...

my opinion? NEVER leave ur notebook inside ur car...

edit: i need logical explanation how the hell it can detect battery/cmos battery...erh...battery did emit any signal? i wondering....