1.USB Port for UMTS/HSPA/EVDO USB Modem 2.1 WAN Port, 4 LAN Ports, 3.Ralink Chipset ... MAC FilteringModulation TechnologyDBPSK, DQPSK, CCK, OFDM, 16-QAM, 64-QAM Quality of ServiceWMMSecurityNAT Firewall, SPI Firewall, MAC / IP / Packet / Application / URL ... Humidity 10%~90% non-condensingStorage Humidity 5%~90% non-condensing high quality Wireless N 300M 4p 3G router