Transmitting small, low frequency analog signal a few feet
I want to wirelessly transmit an electrical signal that's approximately less than 1 volt in amplitude and around a few hundred Hz in frequency. The distance is only a few feet. I don't know much at all about wireless communication. To my knowledge, bluetooth is used for relatively short distances, so that's why I'm in this forum, but I'm open to any standard (whatever gets the job done).
Also, the hardware needs to be small. Any ideas??
If you have any questions, please let me know.