calculator radio waves

[gold24h]

I was just curious if a scientific calculater like on the rangertell could actually be emitting radio waves,in fact it does,i found an fcc warning on a hewett packard scientific calculater,it said this device emitts raido waves but below the limit allowed,it also said it could interfere with tv and othere raido,so there may really be something to this rangertell.Also i found a chat on a forum about taking a calculater and an am radio and making a metal detecter,supposably the calculater sends out signals that the radio picks up.