A WiFi finder is a small, portable, battery
operated device that locates wireless hotspots so you don't have to
turn on your laptop to see if a network is available. The most basic
model is about the size of a mouse, though there are also very small
keychain models.
Most WiFi finders have a single button and three or more LED lights.
Depressing the button starts the device searching for WiFi signals.
Most finders search in the 802.11b/g bands. If no networks are
detected, the LEDs remain off. A weak signal will initiate one light,
while the strongest signal initiates all LEDs. If only one light is
steady, you can head in a direction that causes more LEDs to light.
When lights flash, the signal is intermittent or weak.
A more expensive WiFi Finder might have additional capabilities to
make things even easier. For example, one available model is built like
a small flip phone, where the flipped end acts as a rotating high gain
antenna. This makes it easy to hone in on the direction of the signal
and head towards that area. Once you have located a network, the USB
port on this model allows you to attach the WiFi finder to your laptop
and instantly connect to the network. This eliminates the step of
having to configure each hotspot in the laptop's wireless interface.
Furthermore, the advanced WiFi finder can indicate whether or not a
network is secure, saving time and hassle. Yet another advantage of
this model is that once it connects to the USB port, its batteries are
recharged, eliminating the need to replace them.
When considering a WiFi finder, one of the specifications to pay
particular attention to is how far the device scans. Less expensive
models might scan up to 150 feet (46 meters), while other models can
have the capacity to scan 300 feet (92 m) or more. The ability to scan
not only opens the user up to more possibilities to connect in any
given area, but also improves signal quality. For example, a WiFi
finder that scans up to 300 feet will provide better reception at 150
feet than a WiFi finder that is already at its outer limits of
functionality at that range.
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