The GWF001 WiFi HotSpots Explorer is an RF wireless device operating on 2.4GHz that detects WiFi 802.11b and 802.11b/g signals, it can capture WiFi signal to avoid other interference such as 2.4GHz cordless telephone, A/V sender, Microwave ovens and Bluetooth device. No longer need to boot up your notebook PC just to find out whether you are under Wireless LAN service coverage.