Kensington WiFi Finder Plus
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The Kensington WiFi Finder Plus quickly finds Wi-Fi signals and displays their level of strength. With this device you don’t need to boot up your notebook to track down Wi-Fi hotspots. The WiFi Finder Plus detects 802.11b/g and active Bluetooth networks within range. It also automatically filters out signals from cordless phones, cell phones, and microwaves.
The device includes a clip that attaches to a carrying case or key chain. Its five LEDs (light-emitting diodes) indicate the signal strength in a meter format. And for those times when you need a bit of extra light, the WiFi Finder Plus also has a built-in flashlight.
Kensington includes a one-year warranty on the device and provides free technical support.
[...] When in doubt, always check your signal meter. Do you have enough signal strength to talk to the Access Point? You could simply be out of range. If your client software shows noise levels, check them as well to be sure that you have a high signal-to-noise ratio. It is always possible that a neighbor has just started microwaving a burrito, or maybe they just answered their 2.4 GHz phone. You may also want to get one of this gadget: Kensington WiFi Finder Plus Wi-Fi Trekker WFS-2 Wi-Fi HotSpots Finder DS2400 Digital Hotspotter HS10 [...]