DESC: The i 5881 is part of the worlds first 5.8 GHz family cordless system, offering superior sound quality, security and clarity. On top of Digital Answering System with three separate mailboxes, this system includes a fully functional Handset and Base Unit gives you two-phones-in-one. Features include Sound Select-an innovative technology that provides personalized audio performance; Vibrating Handset Ringer-alerting you to incoming calls with or without an audible ring; and an Analog and Digital Clock Display on the Handset. Expand your i5881 system by adding up to an additional 5 accessory Handsets (model VT 5820) without the need of additional phone jacks. Bring telephone service to rooms where it was previously unavailable!