The Teltonika RUTX09 is an industrial 4G router with 2 SIM card slots. This means you can insert SIM cards from various providers, so you'll always create a reliable 4G connection. This makes the router suitable for critical applications, such as connecting surveillance cameras in places without a fixed line or machines that transmit their status via the internet. You control this router remotely, so you can even solve malfunctions when you're not on location. Connect a fixed line to the router and you'll have 3 built-in internet connections. If 1 of the connections drops, the router will automatically switch to another one. That way, there'll always be an internet connection for you to use.