The Fluke 154 is a standalone tablet based HART communication tool. The tablet configured with the FlukeHART mobile app utilizes a wireless HART modem that connects directly to the HART transmitter being tested or configured. When you combine your Fluke 154 Communicator with a Fluke 750 Series Documenting Process Calibrator or a 720 Series Multifunction Process Calibrator you have a complete HART calibration and configuration solution.