Dual SIM redundancy for continuous cellular connections,
supports 2G/3G/4G.
WAN link management: cellular WAN/Ethernet WAN/WLAN WAN backup. VPN tunnel: DMVPN/IPSec/OpenVPN/PPTP/L2TP/GRE.
Supports Modbus gateway (Modbus RTU/ASCII to Modbus TCP).

Supports Modbus Master
Supports GPS&GLONASS (optional), provides real time location and tracking.
Supports 802.11 b/g/n Wi-Fi (optional), AP and client mode.
Supports SDK, provides user programmatic interface.
Supports 802.1Q VLAN Trunk.
Supports PPPoE Bridge(IP Passthrough).
Auto reboot via SMS/Caller ID/Timing.

Supports RobustLink (Centralized M2M management platform, to remote monitor, configure and update firmware).
Supports RobustVPN (Cloud VPN Portal, to provide easy and secure remote access for PLCs and machines ).
Flexible Management methods: Web/CLI/SNMP/RobustLink.
Firmware upgrade via Web/CLI/USB/SMS/RobustLink.