Check the listing for details. Castle Creations Castle-Link Quick Connect Duo [CSE010-0149-00]. Condition: New. Listed at 21.95 USD. The Castle Creations Castle-Link Quick Connect Duo is a simple device designed for Castle ESC's with AUX wire technology and prevents the loss of settings when you unplug the controller from the receiver. Quick Connect Duo will work with the Field Programming Card when used as a standalone programmer, but only works when using the Field Programming Card as a Castle Link adapter. Features: Installs between ESC and receiver and prevents loss of settings when unplugging Castle controller from receiver Detects the presence of Castle Link adapter on the free lead and switches controller's signal line from receiver to Castle Link Supports all Castle Link capable ESCs, but is designed specifically for use with Castle ESCs featuring AUX wire technology NOTE: Quick Connect Duo will work with the Field Programming Card when used as a standalone programmer. It only works when using the Field Programming Card as a Castle Link adapter. About Us | View Store