The LINBLENET M400D-NA is a compact yet powerful 4G LTE CAT4 industrial router module designed for IoT and M2M applications. Measuring just 2.91 x 1.65 x 0.39 inches, this versatile device features dual 100Mbps Ethernet ports, 2.4GHz WiFi connectivity, and an RS232 serial port. With its built-in hardware watchdog, the router ensures stable system operation. The module supports data transfer rates up to 300Mbps and offers indoor coverage of up to 100 meters. It comes equipped with four retractable antennas and supports WPA2-PSK security protocol for enhanced network protection. The router module is compatible with personal computers and security cameras, making it ideal for applications in network cameras, smart robotics, parking gate systems, and intelligent terminals. Operating on 12V DC power with no battery requirement, this industrial router features push-button control and web interface management. The device includes access point mode functionality and supports 802.11b/g/n wireless standards for comprehensive network compatibility.