- The AT&T ML17929 2-Line Corded Office Phone System with Caller ID/Call Waiting features speakerphone capabilities for up to two separate phone lines.- This easy-to-use corded speakerphone allows you to program up to 18 of your most-phoned contacts into the built-in memory for easy speed dialing.- 3-party conferencing lets you chat with two friends at once, and selectable ringtones let you choose the sound of your ring.- This 2-line corded phone also features a line status indicator, and automatic line selection.- 2.5mm headset port- Inaudible mute

2-Line Speakerphone with Caller ID/CW