Hello piclisters :
For your information who are interested in tx/rx modules...
A UK company called Radiometrix Ltd sent me their catalog on this tiny devices
they have a wide variety of products....

they have a wide variety of products....ranging from 15 to 80 pounds

Radiometrix Ltd.
Clausen House
Perivale Industrial park
Horsenden Lane South,Greenford,Middx.,UB6 7QE
Tel:0181-810 8647
Fax :0181-810 8648
E-mail:radiometrix@dial.pipex.com

Regards,

Barbaros