Check the following links http://www.convergentinc.com/products.html $10 modules! http://www.radiometrix.co.uk/ http://www.rfm.com/ look into Virtual-Wire products I'm sorry to say that I had not tried any of these products, so you are on your own. Regards, Andres Tarzia Technology Consultant, SMART S.A. e-mail: atarzia@smart.com.ar -----Original Message----- From: Tony Nixon [mailto:Tony.Nixon@ENG.MONASH.EDU.AU] Sent: Tuesday, October 26, 1999 20:42 To: PICLIST@MITVMA.MIT.EDU Subject: Rx/Tx Does anyone know of a device that can be controlled by a PIC to send/receive serial data over a radio link with a line of sight range of about 3KM max? Data integrity is very important. -- Best regards Tony http://www.picnpoke.com Email sales@picnpoke.com