The Park BEC is a state of the art switch mode regulator specifically designed to meet the need of R/C electric flyers. No more separate, heavy receiver battery pack, no more checking and installing complicated equipment, simple plug to your receiver and you are good to go.
Many people do not realize that their ESC's BEC rating is misleading. With the linear BEC built into most speed controls, the current rating decreases as pack voltage increases. For example, several popular 25A ESCs with "3A" BECs are only capable of supplying 0.5A when running from a 3S pack.
For best results, ensure that the all BECs are installed at least 2" (50mm) away from your receiver and antenna.