It differs from the Panasonic KX-TG6445T only in that its counterpart is all black. Like is peer, the Panasonic KX-TG6440PK offers text-to-speech technology which says caller ID information, the current time, and even when the battery is low. Other core specifications include call blocking, 4-way conferencing, an intercom, and a Range Extender that allows a conversation to be had even if you’re outside your hour and halfway down the block.