The VTech CS5119-3 DECT 6.0 expandable cordless phone with caller ID and handset speakerphone is built to give you all the features a busy household needs. A full-duplex handset speakerphone allows both ends to speak and be heard at the same time for conversations that are more true to life. Caller ID entries display on a large, backlit LCD screen so you can see who’s on the line even in the dark. Call block up to 20 of those unwanted telephone numbers.