Not sure if my last post didnt make it, or if it got deleted.
I found some things out there. One is pretty close, but quite large. I also found "nRF2402 is the Industry's smallest, lowest cost, lowest current consumption and low voltage supply 2.4GHz RF transmitter. "
If someone wanted to...
I am looking for something that can communicate with another device, so that when the transmitter/receiver are far enough apart, I can trigger a sound or some other event.
* Low power (ideally run on a watch battery for at least 1 year).
* Range minimum of 20 ft. 50ft+ ideal
* Very small...