Arduino RF Transmitter and Receiver

Job ID: 32477152

Budget: $30 – $250 AUD

See Attached
I have a UltraSonic Speaker
I want to use an Arduino to send a sound to it.
What I want to do is to have to push a FOB Button as the transmitter and have the Arduino be the receiver and play the sound listed in the LRAD link.
The LRAD Link shows an Amplifier..but my speaker has it already.
I ned a someone to show me what is required for a complete project.