Router iRZ RUH has 2 sim card slots and can switch to either one of them in an automatic mode or by the command through web interface. Automatic switching happens either when the connection with the operator is lost or by the set schedule. In case switching is done due to the connection loss the switching back to the priority sim card option is available. Router iRZ RUH has a large number of various functions which are easy to control and use: NAT function for the access to the internal resources of the network from outside; DynDNS client for domain name information refreshment when using the dynamic IP address; GRE, IPsec and OpenVPN tunnels; Synchronization of the internal clock with external source; 2 sim cards with automatic twitching.