I need to build a simple RF transmitter and receiver to do the following
I need to be able to press a button to wirelessly make a beeping sound
the receiver has to be as small as possible and preferably be able to run on 1.5 -3 volts
the rest dose not rely matter it would be kind of cool if the transmitter could run on 5 volts so I could power it from a usb port, it only has to work as far as a small bedroom
the intended purpose is to put the receivers in a few things so I can find them because I keep losing them