DESC: The ultimate two-line system for the home or office; this 2.4GHz Digital Spread Spectrum system features a digital answering system with a separate mailbox for each line, handset and base speakerphones, Call Waiting Caller ID, 50 name and number phone book directory in both base and handset, and headset compatibility. Expand your VT 20-2481 by adding up to 7 accessory handsets (model VT 20-2420) without the need of additional phone jacks. Bring telephone service to rooms where it was previously unavailable!