Completely hassle free -- no more booting up your notebook to find a WiFi signal； No software or computer required Detects most available WiFi networks with the press of a button Five lights indicate signal strength The blinking of green light indicates strong signal while the green one indicates no signal Detects 802.11b and most 802.11b/g signals from up to 200 feet away(outdoor) The Finder will be activated by only a press the button Compact and lightweight - fits in your pocket. Inbuilt batteries Detects hotspot can reach more than 100 meters(outdoor)