Standards: GSM/GPRS/EDGE/UMTS/HSPA/UMTS/HSPA+/FDD LTE. Dual SIM redundancy for persistent 2G/3G/4G cellular network connections. RobustOS + SDK + App. IPsec/OpenVPN/GRE/L2TP/PPTP/DMVPN. Management and maintenance via Web/CLI/SMS/SNMP/RobustLink Cloud. Robust industrial design (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.