It features Panasonic Voice Paging which acts as more than a conventional intercom. VP makes it easy to send clear, simultaneous announcements to every handset in the house, even when family members don’t respond. It also features Panasonic’s exclusive Silent Mode, which enables users to program each handset not to ring during specified hours. The Kx-Tgf544B has a digital answering machine with 17 minute recording time, and its dedicated Call Block button easily blocks up to 250 telemarketers, robocallers and other unwanted numbers. The Kx-Tgf544B features a full duplex speakerphone, headset jack, baby monitor, noise reduction, is wall mountable and can support up to 6 handsets.