All, Browsing through the latest Tech America (now Radioshack.com) catalog, I came across the following RF Transmit/Receive modules. As the question of where to buy RF modules appears frequently on the list I thought I would pass along this info FWIW. Cat #: 900-6896 Mfr's #: TX433 UHF Transmitter 433.92MHz $9.85 3-12v operating voltage range, 200 meter range. Cat #: 900-6895 Mfr's #: RX433 UHF Receiver 433.92MHz $9.95 4-5.5v operating voltage range. If anyone has used these modules, please provide us some feedback. These look perfect for a semi-autonomous (a la Mars Sojourner) robot I have been thinking about building (PIC based, of course). Adam Bryant (age 0x23) abryant@peaktech.com (work) adamdb@juno.com (home) Parker, CO, USA Robotics, RC Airplanes, anything using a PIC ___________________________________________________________________ Get the Internet just the way you want it. Free software, free e-mail, and free Internet access for a month! Try Juno Web: http://dl.www.juno.com/dynoget/tagj.