A Dual SIM CARDS 4G LTE Router & WiFi With Auto SIM CARDS Switcher Function at load drop. Firewall, Openvpn & DTU) An Industrial router that meets critical needs. A one station multi-device access, supports 3g / 4g and 5g (optional) mobile broadband networks system, wi-fi function, serial dtu. .. This industrial router provides users with a web-based configuration interface. users only need to configure through a web browser or telnet / ssl. features• cpu:qca9531/650mhz, flash:16mb (max32mb), ddr2:64mb (max128mb)• the system supports openwrt /lede. • 2.4ghz 2t2r 300mbps technology is adopted to meet multi-user connection application. • mini-pcie interface and sim card slot are provided to support the expansion of built-in 3g / 4g applications. • it supports one 100 mb lan and one wan port to meet the application requirements of different customers. • provide rs232 / rs485 dtu interface to meet the user's extended application. • the reset default button is provided.