Call Waiting Caller ID up to 99 Name/Numbers</br>3 Party Conference/Do Not Disturb/Privacy Setting</br>Data Port?? Headset Jack</br>16 Programmable One-touch Speed Dials</br></br>Product Description</br></br>Rca 25425re1 4-Line Expandable Phone System (With Speakerphone) 4-Line Expandable Phone System With Speakerphone?? Call Waiting Caller Id & Digital Answering System ; Plug-&-Play; Large Backlit Lcd Display; 4 Lines Offer Programmable Distinctive Rings & Line-In-Use Indicators; Features Digital Answering System With Auto Attendant & Base Speakerphone; 40-Name/Number Memory; 3-Way Conferencing; 16 One-Touch Memory Buttons; Features Call Transfer?? 1-Touch Redial?? Do Not Disturb?? Intercom?? Mute?? Flash & Hold Functions ; Compatible With Headsets & Hearing Aids; Expandable Up To 16 Handsets With Optional Rcach5401re1 Accessory Handset; 2-Year Warranty; With Speakerphone?? Digital Answering System & Call Waiting Caller Id.</br><br/>http://www.amazon.com/gp/product/B000UVNM1S