ASUS is currently the world's largest motherboard manufacturer, the world's third largest graphics card manufacturer, the fourth largest PC supplier in 2015, and also has a strong competitiveness in the field of IT accessories. ASUS has three portable routers: WL-330NUL, WL-330N, and WL-330N 3G, all of which are designed to be thin and light, and the WL-330N is the title of "the world's smallest router", weighing only 17.5g, which can be carried with zero burden. ASUS portable routers are compliant with the 802.11n wireless standard and have two built-in IFA omnidirectional antennas, which have excellent signal strength, coverage, and stability in real-world tests, and can still reach close to 30Mbps in the case of 10-thread downloads, without being affected by their small size. In addition, the WL-330N 3G also supports USB 3G network card and USB port charging, which is very practical with rich functions. The ASUS EZUI interface is very simple and easy to navigate, so even IT novices can set up the network smoothly. However, ASUS portable routers are currently only available in Taiwan, and the purchase channels in the mainland are limited, ranging from 200 yuan to more than 300 yuan, which is suitable for consumers who are not sensitive to price and have high requirements for portability.