The Fluke 177XLTEMODULE LTE Module allows communication with the Fluke 177X Power Quality Analyzers. For data transmission and access via the cell phone network, the 177X must be close enough to a compatible cell tower. Installed directly into the 177X, a suitable antenna is required for communication (sold separately). When using basic connectivity, the IP address of the SIM card (sold separately) becomes the primary point of connection.