DESC: 4-Line Capability Lets you connect and use with up to four separate phone lines. Multi-Line Conferencing Allows you to talk simultaneously on all lines coming in to the phone. Built-in Data Port allows quick, convenient connection of a computer, modem, or answering device. Large, Easy-to-Read LCD Display Shows Number dialed, Clock time and date, Call time. 32-Number Instant Access Memory Dialing Handy index of memory numbers in base. Memory back-up with optional 9-volt battery. Adjustable Electronic Volume Controls Lets you adjust volume of speaker, handset, headset and ringers. All Station Page Allows one station to make announcements to all other stations. Do Not Disturb Option Prevents telephone from ringing. Time length is programmable.