1) Pocket 3G Router 2) Connected by USB 3G modem 3) 3G mobile router 4) WiFi, Built-in battery, DHCP,DDNS,DMZ, NAT Without ... :1 LAN port, 1 WAN port, USB port for external modem, Micro SD slotProtocol support: TCP, UDP, SMTP, POP, ICMP, FTP ... operation48 hours for idle time Pocket 7.2Mbps 3G WIFI Wireless Router-MH668B