I have received a couple of emails on the subject, so I'll post info here.
The first one of these units I saw was Far-East made, at an exhibition on Bahrein, but I can't find the company now. However, there's a company in Manchester (UK) who make a range of these and, yes, it will keep you "mobile free" in a restaurant
http://www.sesp.co.uk/21.htm
The "UK-compatible" version for "securing" a small area is under a hundred quid (until you add the 17% Victimise All Transactions tax
)
But note NrFairy's comment - they are a
radio jamming device and also a
radio transmitter and as such come under the Radio Regulatory body.
Also consider that somebody in the vicinity may be a doctor or other emergency personnel (or air-crew on stand-by!) and the jammer is going to stop reception of any emergency call on the cell-phone
! ! !
edited to get my UBB codes right!
[This message has been edited by ExSimGuy (edited 10 March 2001).]