Offering the benefits and functionality of a full-fledged router the WL-330NUL can work as a router for wired Ethernet, or for Wi-Fi in either hotspot, or secured access-point mode. The RJ-45 Ethernet LAN input jack at one end allows the router to act as a WAP (Wireless Access Point) by securely broadcasting a Wi-Fi signal for one or several devices to access. Its router capabilities mean that a single connection can be shared on multiple devices without needing to get new log-in credentials, or to pay for additional accounts. Asus says the connections do not deteriorate when extra devices are added.

An Ethernet output source is not needed. Wi-Fi hotspots will do just fine, and a common use will undoubtedly be to provide a much improved level of security for travelers when accessing Wi-Fi hotspots at coffee shops and airports. In any usage case an RJ-45 Ethernet LAN input port is not needed on one or more laptops, tablets or smartphones to reap the benefits. The  Asus WL-330NUL simply plugs into a USB port to receive power, or if needed it can plug into a wall power outlet using the provided adapter. It then supports up to 128-bit encryption, and is compatible with Apple Inc.'s iOS and Mac OS, as well as various Microsoft Windows operating systems including Windows 8, while providing secure Wi-Fi access.

Asus says the WL-330NUL is basically setup-free with "one-click network management and guest access control" for connection sharing with other users, while keeping data safe and maintaining confidentiality.

The Asus WL-330NUL pocket-sized wireless router is compatible with USB 2.0 and 3.0, and provides support for 802.11 b/g/n Wi-Fi at 2.4GHz. It is 2.56-inches / 65mm in length, and weighs just over half of an ounce at 17.5 grams.

The world's smallest router is expected to be available sometime in March 2013 for about US-$40, and may be pre-ordered at Expansys.com.