The VTech VG231-4 DECT 6.0 4-Handset 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. DECT 6.0 transmission gives you private, interference-free sound from any room in your home.