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Now, there is a much easier solution. US peripherals maker Kensington has introduced worlds first: a detector that will locate Wi-Fi networks. No more booting up your notebook to find a Wi-Fi signal.
The small device detects 802.11b and 802.11g signals from up to 200 feet away and filters out other wireless signals, including cordless phones, microwave ovens and Bluetooth networks. Three lights indicate signal strength. For $29.95 that's seems a bargain.