3G & 4G Supported Dual SIM / 1 * MicroSD 2 * 10/100Mbps (2 * LANor 1 * WAN + 1 * LAN) 1 * RS232or 1 * RS232/ RS485(Switchable) 1 * DI + 1 * DO Optional:Wi-Fi / GPS / PoE PSE SUPPORT GPS