What to look for
There's a hand-held PDA device to suit practically every budget and need. You need to
consider just how much data you want to carry with you and how connected you want to be.
Obviously more memory, faster processor and bigger screen attract higher price tags.
You can compare brands, models and prices by searching Dealvalues.com using the
following specifications to guide you.
A budget basic unit might offer a
processor speed of 16 MHz, 8MB of memory and at 2.5 inch (diagonal)
screen. At the high end, you can get a 4GB micro hard drive, WiFi and
Bluetooth connectivity, 400 MHz processor, 256MB memory, with expansion
slots, 4 inch (diagonal) LCD screen with 65,000 colours and 640 x 480
display resolution, GPS functionality, MP3 player, digital camera and
instant messaging. In the middle of the range you will find devices
with 64MB of memory, a 200 MHz processor, 3 inch screen and built-in
microphone or audio input jack. Bear in mind that all of these
specifications and functionalities change continuously, and devices are
upgraded with new features over very short spaces of time.
Apart from processor speed, memory
and screen size, some of the critical specifications that you can use
for cost and brand comparisons include:
Data input - While some
models have a full QWERTY keyboard built-in, you may want to consider
adding a fold-up full-size external keyboard. Entering lots of text
with the small built-in keypads or using the handwriting software can
be frustrating.
Audio input - A built-in microphone or microphone jack is needed for recording voice memos and meeting notes and store audio files.
Music playback - MP3 audio file playback can sometimes need additional software.
GPS - While there are a
number of purpose-built hand-held devices for industrial applications,
your PDA's GPS capability may not be suitable for rugged outdoor
activities.
Communication - Look for integrated Bluetooth 1.1 and a built-in 802.11b Wi-Fi adapter
Smartphone - Combines the
functions of a mobile phone with a data management device in a single
unit. Phone capability requires a separately purchased service contract
Audio Output - A headphone jack is essential for listening to your audio files
Cradle/Charger - This device
allows for easy connection and synchronization with your PC while
simultaneously recharging your battery. Consider buying an additional
cradle for the office for maximum convenience. Some PDAs include a
cable or a special cradle that provides an interface with your desktop
computer to synchronize data.
Battery life - Each device
will have its own battery-life characteristics. Battery recharge life
is also dependant upon the data you are processing. You can use
manufacturer's specifications as a guide to compare between brands and
models, but these specifications are laboratory measurements and may
not reflect your actual use.
Bluetooth - This wireless
technology lets you to exchange data with other handheld devices or any
other Bluetooth enabled device such as a cell phone, fax machine,
personal computer, laptop computer, headset or printer. The Bluetooth
feature will allow you to add an external keyboard.
Digital camera - PDA cameras
usually capture low resolution images (around 1.2 megapixels), which
are perfect for emailing but not ideal for printing.
GPS - Global positioning system allows you to navigate from any point on or near the surface of the earth.
Music/Audio - The MP3
playback quality will depend on the bit rate of the audio file and the
quality of the built-in speaker. The audio quality is often better when
played back through a quality headset.
PDA Screen - PDA screen sizes
are measured in inches diagonally and are available from 2.6 inches up
to 5 inches on the very high-end. Larger, brighter screens require more
power to operate therefore increase battery consumption.
Processor speed - refers to
the speed in which a PDA coordinates its internal functions. Processor
speeds are measured in MHz (megahertz) and range between 4 MHz and 624
MHz. Although these specifications can change rapidly as technology
develops, it is recommended to have a processor speed of at least 16
MHz for general day-to-day functions.
Video capture - Video playback often requires an additional expansion card and a third-party software download, and higher memory capability.
Web Browser - Used with a Wi-Fi connection, lets you browse the internet as you would from a desktop computer.
Wi-Fi - Integrated 802.11b
WLAN (wireless local area network), enables you to connect to the
internet in any hot spot. Enabling the Wi-Fi features tends to consume
battery life quickly.