Word: mhz
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Dates: during 2000-2009
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...HAND Dell's first Axim drove down the price of no-frills Pocket PCs. The Axim X3 picks up the pace with a 400-MHz chip, 64 MB of memory and wi-fi for Web surfing at hot spots...
Only the $99 Air Bud sold by RadioShack was truly awful. It was also the only unit that uses 900-MHz wireless technology instead of Bluetooth. First, you need to charge it for three hours via the cigarette lighter in your car (and in many cars, with the motor running) or else buy a separate wall charger for $15. Worse, the headset was bulky and hurt my ear. But the clincher was the dismal sound. "It sounds like you're on an international call," my sister told me. Definitely not the effect I was going...
...promise more clarity because there are fewer devices that operate on the same frequency and thus fewer to cause interference. If you have a cordless phone that is a couple of years old or even a new one that costs less than $50, chances are it is a 900-MHz model that is highly susceptible to static or buzzing from baby monitors, wireless speaker systems and your neighbors' 900-MHz phones. The newer 2.4-GHz units, introduced as an improvement over the 900-MHz models, do get less static, but wireless home networks and microwave ovens can still trigger...
...really worth an extra $100 (or more) to step up to 5.8 GHz? Maybe. When I tried out the Panasonic KX-TC1481B, a $39 900-MHz model, I could hear other conversations and even music coming through the phone. I got much clearer reception with the Motorola MA351, a $60 2.4-GHz model--except when I turned on my microwave oven and was assaulted by weird vibrating noises coming through the handset. Still, the Motorola is a decent option at a fair price...
...other factors are worth keeping in mind. First, ask about battery life. While I liked the reception best on the Uniden, for example, it can go only four hours between charges vs. eight on the Vtech. Next, find out if the phone is analog or digital. Both 5.8-MHz phones are digital, but that's not always the case with the models that use other frequencies, and this makes them an easier target for eavesdroppers. The best digitals use digital spread-spectrum (DDS) technology, which sends the signal down a broad range of frequencies to ensure that it gets through...