A wireless network hotspot detector. Is used for locating an excellent location from which access to a wifi wireless network is best. Detects network activity on 802.11b/g wireless networks in less than a second. Works within 300 feet of a transceiver antenna, and gives indications of signal strength and direction. Does not give false positive readings from microwave ovens, portable phones, or any device using the 2.4 ghz bandwidth.Conviently fits on a keychain for ready acess. Has easy to find replacement batteries that will last over a year.