The X5S IP phone is a dynamic business communications tool for superior voice communications and extended DSS screen functionality. It has a faster, more responsive interface than the X3/X4 and offers better overall performance. The X5S is a 16-line IP phone and 3.5 inch large color screen. What's more, the X5S is built with Gigabit Ethernet technology for rapid call handling. Plus, with an all-new USB port, the X5S boasts unparalleled functionality and expansibility with Bluetooth, USB recording features.