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 ... . 100Mbps downlink, 50Mbps uplinkInterface Antenna50Ω SMA female interface, externalSerial portDB9 (RS232/RS485 optional)LedPower indicatorData indicatorUIM/SIM1.8V/3VUSBUSB 2.0 ...