The ICR-3211B has: a super capacitor to offer up to 30 seconds for a “last gasp” message, usually to send an alarm in the event of mains power loss. A single SMA antenna connector, DIN or wall mount brackets included, (2) 10/100 Ethernet ports, RS-232, 485, and GPIO connectors. Dual SIM and eSIM support for multi-carrier connections. Finally, grounding screw and LEDs for easy installation and on-site troubleshooting.