The 475 Field Communicator builds on the industry-leading technology of the 375 Field Communicator while adding innovative new capabilities including color display, Bluetooth communication, and advanced field diagnostics with applications like ValveLink™ Mobile. What you get is the most powerful handheld available – universal, user upgradeable, intrinsically safe, rugged and reliable. Only the 475 Field Communicator can deliver all this in a single handheld communicator.