Dual SIM redundancy for continuous 2G/3G/4G cellular network connections. The feature Link Manager supporting Cellular WAN, Ethernet WAN, WLAN WAN link backup and ICMP detection. WAN – Static/PPPoE/DHCP Client. WAN port supporting PD feature - compatible with 802.3at. (optional). RobustOS + SDK + App. IPsec/OpenVPN/GRE/L2TP/PPTP/DMVPN. Management and maintenance via Web/CLI/SMS/RobustLink Cloud. Auto reboot via SMS/Timing. Robust industrial design (9 to 26V DC or 9 to 36V DC, desktop or wall mounting or DIN rail mounting). Antennas and power supply are not included. Refurbished device that was used for testing purposes.