This C-U0014 receiver is compatible ONLY with these presenters: Wireless Presenter R400 with Model Number (M/N) = R-R0008, Professional Presenter R700 with M/N = R-R0010 and Professional Presenter R800 with M/N = R-R0009 WARNING: This is NOT compatible with Wireless Presenter R400 with M/N = R-R0004, Professional Presenter R700 with M/N = R-R0006, Professional Presenter R800 with M/N = R-R0003 VERY IMPORTANT NOTE: You can find the model number (M/N) of your presenter inside the battery compartment. Check your presenter PN to determine if this is what you need!