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NTI E-4GU-3 USB 4G Modem$227.20
NTI, e-4gu-3, USB 4G Modem 4G LTE Features: Sends SMS text messages to a pager or cell phone when a sensor goes out of range of a configurable threshold. SIM card supporting SMS messaging required (not included). Supports fourth generation (4G) digital cellular standards.
USB 2.0 stick with Male USB Type-A connector