Three miniPCI slots and three Ethernet ports give you enough connectivity options to use the RB433UAH as the central part of your network. In addition to our regular model, the UAH version adds more RAM, our popular high-speed Atheros 680MHz CPU, a microSD card slot and two USB 2.0 ports, making this the perfect universal choice for serious networks. The two USB 2.0 ports can be used for extending storage, adding a 3G wireless modem for backup connectivity or for a mobile installation, or all together. A microSD card gives you the ability to add more storage for Webproxy cache, logs, or Metarouter virtual machines. The RB433UAH comes with a 680MHz Atheros CPU and is preinstalled with a Level5 RouterOS license. RouterBOARD 433U with Atheros 680Mhz CPU, 128MB RAM, three LAN, three MiniPCI, microSD slot, Voltage Monitor, Fan headers, two USB ports, NAND Storage with RouterOS Level 5 (AP support)