The technology utilized by cordless phones has changed dramatically. Cordless phones have evolved to include the unsurpassed audio clarity of 5.8 GHz phones, expandable systems, color screens, recordable ringers and more. From 5.8 Ghz systems for the best performance for clarity, range and security to 2.4 Ghz for increased clarity, range and security over 900 MHz models. In larger applications wireless phones can be a great solution. With wireless phones your signal range has know expanded to compansate for the multi-floor office or the industrial size warehouse.