This is the Arrma IC5 Loop Connector for use with models that use two IC5 or EC5 connectors, and using one battery is desired. This ARRMA IC5 Loop Connector allows the use of a 4S or 6S LiPo battery pack in your ARRMA vehicle. It should be connected to one of the ESC-to-battery plugs when using a single 4S or 6S battery. The IC5 connector provides a reliable, efficient connection between the ESC and battery.