The AT&T 993 Corded 2-Line Speakerphone is ideal for a company that needs telephone that can handle two lines. You can make and receive calls by using the keypad and Speakerphone in the station. The phone's three-party conferencing lets you conduct business with three people communicating together on three different lines. Automatic line choice indicates that when the phone is ringing and you pick up, you will be linked with the one that is ringing. You can also set up different ringtones for each of the lines Caller ID, call waiting caller ID 99# Caller ID memory 100# Phonebook 18# Speed dial 4-Line backlit LCD Speakerphone Switchable data port Message waiting/new call indicators 3-Party conferencing Display dial Distinctive ringing for each line Receiver, speakerphone, and headset volume controls Line status indication Redial / flash / pause / hold / mute Automatic line selection Hearing aid compatible Programmable pause Remove button 2.5mm Headset jack Wall mountable Requires 1 9V battery, not included Black