The Calsense Cellular Communication Option, model CS3-GR, is an embedded industrial-grade 4G LTE wireless solution offering the latest LTE performance, time- sensitive event tracking and cloud connectivity. Flexible and robust, the CS3-GR option is an intelligent gateway which automatically detects if the connection to the cloud is lost and reestablishes its connection. Designed for the harshest of environments, this device ensures you can remotely manage your controllers nearly anywhere within the United States.