The outstanding advantages of WIFI in Wireless Data Transmission Technology 
First, the coverage of radio waves, Bluetooth-based technology coverage is very small, the radius is only about 50 feet or so about 15 meters, while the Wi-Fi radius of up to 300 feet or so about 100 meters , the office since Needless to say, that is, in the whole building can also be used. Recently, a new switch was introduced by Vivato. It is reported that the product can be the current Wi-Fi wireless network 300 feet  close to 100 meters  communication distance extended to 4 miles about 6.5 km .
Second, although the quality of wireless communication transmitted by Wi-Fi technology is not very good, data security performance worse than Bluetooth, transmission quality to be improved, but the transmission speed is very fast, can reach 11mbps, in line with personal and social information needs The
Third, the manufacturers to enter the field of the threshold is relatively low. Manufacturers as long as the airport, stations, coffee shops, libraries and other personnel more intensive place to set a "hot", and through high-speed lines to the Internet access to the above sites. In this way, because the "hot spots" emitted by the radio waves can reach tens of meters from the access point radius of 100 meters to the place, the user as long as the wireless LAN to support the laptop or PDA to the area, you can access the Internet at high speed The In other words, manufacturers do not have to spend money to network cabling access, thus saving a lot of costs.
According to the wireless card using the different standards, WIFI speed is also different. Which IEEE802.11b up to 11Mbps (some manufacturers in the case of equipment can reach 22Mbps), IEEE802.11a 54Mbps, IEEE802.11g is 54Mbps.
WIFI is a wireless network consisting of AP (Access Point) and wireless card. AP is generally called a network bridge or access point, it is as a traditional wired LAN and wireless LAN between the bridge, so any PC with a wireless card can be connected through the AP to share the wired local area network And even the wide area network resources, its working principle is equivalent to a built-in wireless transmitter HUB or routing, and wireless card is responsible for receiving the signal transmitted by the AP CLIENT device.