This is a 4-cell holder for batteries to power a receiver. This has a BEC plug pre-wired onto it and will not go directly into the receiver. A switch harness with a J type receiver plug and a male BEC plug must be used to connect this holder to the receiver. INCLUDES: One 4-AA Cell Holder w/male Red BEC Connector. REQUIRES: A switch harness to go between holder and receiver, use FUTM4382.