The Panasonic DECT 6.0 4-Handset Cord/Cordless Phone features DECT 6.0 technology for a clear and crisp audio. The digital answering machine includes 25-minutes of voicemail storage. This phone also features a line power back-up mode in case of power outage. A four-handset corded base and three cordless handsets with answering machine Easily block up to 50 telemarketers, robocallers and other unwanted numbers with one-touch dedicated call block buttons on base unit and handsets. Other conveniences include 70 entry phone book, speed dial, night mode, speakerphone, long battery life and expandable up to six handsets and more.