If you want to transmit data wirelessly with two Arduinos and cheap RF breakout boards, look no further!
A complete tutorial on the SYN115 transmitter and SYN480R receiver radio frequency chips have just been brought up online and is available by clicking here.

If you missed it, you can also start by reading the review of these two chips as they are relatively new on the market: https://idyl.io/2017/02/11/syn115-transmitter-syn480r-receiver-review/
Have fun tinkering wirelessly!