The 8200uF high capacity RC Power Buffer Capacitor and Voltage Protector with mounting base is connected to a free Receiver/FBL port to protect the receiver or FBL from Back-EMF interference as well as minimize the possibility of brownouts. It’s highly recommended when the source of the power is far from the Receiver/FBL unit such as the ESC/BEC is mounted far from the Receiver/FBL. The capacitor comes with a mounting base and it’s attached top the base. The base includes a self-sticking double sided foam tape to affix it in place.