... allow user to secure their full house and have a piece of mind .CX-218 is specifically design to ... back to base function for monitoring and also offers a self monitoring option. CX-218 Is capable of ... themselves using self monitoring option. CX-218 package is a complete Plug & Play system, less the one to ... back to base monitoring)Fully functional phoneCertifications CE, A-TIC, Oz-Tel, C-TIC, FCC, UL