Milesight - 3G & 4G Supported GPS Supported 1 * Nano SIM-4FF 1 * 10/100Mbps LAN Port 1 * RS232 + 1 * RS485 (Switchable) 1 * DI + 1 * DO 1 * USB 2.0 (for Power Supply & Network Supply & Debug) IP30 Rated Compact Size for Suiting Small Embedded Scenarios