I seem to remember the ones I saw before...they had simple saw ceramic
resonators and ran at 433 mhz and promissed 300 feet minimum range. It
was a single chip with a few components and was an AM transmitter. The
receiver was simarilly small and simple.

Didn't QST publish an article within the last few months about very-
low-power fox-hunt transmitters using the module you are describing.

--Myron, W0PBV.
--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)