The Panasonic KX-TG6700B 5.8 GHz Expandable Cordless Phone System is a combination expandable cordless phone and answering machine. Its 2-line expandable phone system gives you all the call-managing options you need for your growing household or small business. The base unit comes with a single cordless handset, and you can add up to seven more cordless handsets for additional rooms. Handset and base have keypads & built-in speakerphones for added convenience. The digital answering system holds up to an hour of messages, and the 50-entry directory gives you easy access to your frequently dialed numbers. You can even do four-way conferencing between two handsets and both of the outside lines. Call Waiting Caller ID shown on handset (Requires subscription from local phone service provider) Voice Enhancer Technology adds lost frequencies back to voices Chain Dial links programmed numbers together for one-touch dialing 50-entry phone directory; 50-entry Caller ID memory Handset and base speakerphone 4-way conferencing between handset, base unit and 2 outside lines NiMH rechargeable battery--up to 5 hours of talk time per charge