M2M Industrial 4G LTE Modem with SIM Card Slot 1. 100mbps speed 2. VPN, WiFi ... ,DDNS,DMZ,NAT,NAPT 4. Watch dog M2M Industrial 4G Modem with SIM Card Slot>>| Hot SpotBroadband M2M communicationsSIM failover/standby ... (HSUPA/HSDPA/HSPA/HSPA+)l GSM EDGEl GSM GPRSl CDMA1xl CDMA EVDO Rev 0 and Rev Al 4G LTECellular Frequencyl UMTS ...