Kindle DX Wireless Reading Device

Technical Details

Display	9.7" diagonal paper display with latest generation E Ink Pearl technology, 1200 x 824 pixel resolution at 150 ppi, 16-level gray scale, new 10:1 contrast ratio.
Size (in inches)	10.4" x 7.2" x 0.38".
Weight	18.9 ounces.
System Requirements	None, because it's wireless and doesn't require a computer.
Storage	4GB internal (approximately 3.3GB available for user content).
Battery Life	Read on a single charge for up to 1 week with wireless on. Turn wireless off and read for two to three weeks. Battery life will vary based on wireless usage, such as shopping the Kindle Store and downloading content. In low-coverage areas or in EDGE/GPRS-only coverage, wireless usage will consume battery power more quickly.
Charge Time	Fully charges in approximately 4.5 hours via the included U.S. power adapter. Also supports charging from your computer via the included USB 2.0 cable.
Connectivity	HSDPA modem (3G) with a fallback to EDGE/GPRS; utilizes Amazon Whispernet to provide wireless coverage via AT&T's 3G high-speed data network in the U.S. and partner networks outside of the U.S.
USB Port	USB 2.0 (micro-USB connector) for connection to the Kindle DX power adapter or optionally to connect to a PC or Macintosh computer.
Audio	3.5mm stereo audio jack, built-in stereo speakers.
Content Formats Supported	Kindle (AZW), PDF, TXT, Audible (formats 4, Audible Enhanced (AAX)), MP3, unprotected MOBI, PRC natively; HTML, DOC, RTF, JPEG, GIF, PNG, BMP through conversion.
Included Accessories	U.S. power adapter (supports 100V-240V), USB 2.0 cable, rechargeable battery. Book cover sold separately.

Review Kindle DX Wireless Reading Device

The Kindle DX works as described, downloads books effortlessly and connects to the Internet for basic web browsing.
Battery life is exceptional and an image can be left in the screen indefinitely without drawing additional power.
As a mobile text-only ebook console, I give it 4 out of 5.

Reading is simple, although I would prefer a touchscreen for page turning.
The buttons on the right feel like I could break them if I pushed too hard.

Screen refreshes are slow, the interface for font size and speech are clunky.
Speech works well, but mispronounces quite a bit. A wider variety of choices
would be nice. Amazon should steal a page from Garmin's GPS recipe.
I do however like the choices in reading speed, I enjoyed letting it read War of the Worlds to me.
Amazon has a huge selection of free eBooks.

Browsing anything other than Amazon's book store is painful.
Even Wikipedia (the primary reason I wanted the 3G model) takes far too long to load.
But it's free right?

The Kindle views PDFs natively and does so quite well.
I did not have much luck converting PDFs to kindle ebook format, they worked much better as-is.
I use it to carry manuals with me and look up answers while in the data center or away from my desk.

For Complete Comparison Ereaders you can check on Ebook reader Comparison.

Kindle Wireless Reading Device 3G + Wifi

Kindle Wireless Reading Device 3G + Wifi have detail similar to Kindle Wireless Reading Device Wifi but has the advantage 3G Connectivity HSPDA modem (3G) with a fallback to EDGE/GPRS; utilizes Amazon Whispernet to provide wireless coverage via AT&T's 3G high-speed data network in the U.S. and partner networks outside of the U.S.
And of course with a higher price compare with Kindle Wireless Reading Device Wifi without 3G Conectivity.

Kindle Wireless Reading Device Wifi or Kindle Wireless Reading Device 3G + Wifi right for me?

Kindle Wi-Fi is a great choice if you already have a high-speed internet connection and wireless router set up in your home and do not need the added convenience of a 3G connection. 3G enables you to download books anytime, anywhere, while on the go. If you do not have Wi-Fi set up in your home, Kindle 3G may be a better option.

Kindle 3G + Wi-Fi is the easiest option because there is no wireless setup—you are ready to shop, purchase, and read right out of the box. Built-in Free 3G connectivity uses the same wireless signals that cell phones use, but there are no monthly fees or commitments—Amazon pays for Kindle’s 3G wireless connectivity. The added convenience of 3G enables you to download books anytime, anywhere, while on the go—without having to find a Wi-Fi hotspot connection. With wireless coverage in over 100 countries and territories, Kindle 3G is a great option for travelers.

For Comparison Kindle you can check on Kindle Comparison.

Kindle Wireless Reading Device Wifi

Kindle is our #1 bestselling item for two years running. It’s also the most-wished-for, most-gifted, and has the most 5-star reviews of any product on Amazon.

Technical Details

Display	Amazon's 6" diagonal electronic paper display, optimized with proprietary waveform and font technology, 600 x 800 pixel resolution at 167 ppi, 16-level gray scale.
Size (in inches)	7.5" x 4.8" x 0.335" (190 mm x 123 mm x 8.5 mm).
Weight	8.5 ounces (241 grams).
System Requirements	None, because it's wireless and doesn't require a computer.
Storage	4GB internal (approximately 3GB available for user content).
Battery Life	A single charge lasts for up to a month with wireless off. Keep wireless always on and it lasts for up to 3 weeks. Battery life will vary based on wireless usage, such as shopping the Kindle Store, web browsing, and downloading content.
Charge Time	Fully charges in approximately 4.5 hours via the included U.S. power adapter. Also supports charging from your computer via the included USB 2.0 cable.
Wi-Fi Connectivity	Supports public and private Wi-Fi networks or hotspots that use the 802.11b, 802.11g, or 802.11n (in b or g compatibility mode) standard with support for WEP, WPA and WPA2 security using password authentication; does not connect to WPA and WPA2 secured networks using 802.1X authentication methods; does not support connecting to ad-hoc (or peer-to-peer) Wi-Fi networks.
USB Port	USB 2.0 (micro-B connector) for connection to the Kindle U.S. power adapter or optionally to connect to a PC or Macintosh computer.
Audio	3.5 mm stereo audio jack, rear-mounted stereo speakers.
Content Formats Supported	Kindle (AZW), TXT, PDF, Audible (Audible Enhanced (AA, AAX)), MP3, unprotected MOBI, PRC natively; HTML, DOC, JPEG, GIF, PNG, BMP through conversion.
Included Accessories	U.S. power adapter (supports 110V-240V), USB 2.0 cable, rechargeable battery.

Review Kindle Wireless Reading Device Wifi

The good:
I'd honestly rather read linear fiction from it than a book, because I can't always get comfortable with a book. Hardcovers are sometimes a bit heavy, and paperbacks don't always lie open easily. The Kindle is incredibly light and thin. I can hold it in one hand easily. The page turn buttons are conveniently located. Page-turns aren't instant, but they're probably quicker than turning a physical page in a printed book. The contrast is better than other ereaders I've seen. There is zero eye strain in good light. My eyesight isn't the greatest and I like being able to increase the font size and read without glasses. I love being able to browse the Kindle store and read samples before deciding to purchase. The "experimental" browser is surprisingly usable, but isn't great. It is useful for browsing wikipedia and blogs. The biggest drawback to the browser is the awkward pointer navigation, using the 5-way pad. It syncs your furthest read page over the internet so you can pick up where you left off using your iPhone or iPad.

The so-so:
The kindle store could use more categories and sorting options. You can't sort by "top rated," and there is no category for "alternate histories," for example. Finding a very-specific type of fiction relies on keyword searches, which don't do a great job. The wifi sometimes doesn't connect before it times-out. You rarely need the wifi, but it is annoying if you change a setting, answer "OK" to the prompt to connect, and the thing tells you it failed to connect two seconds later (the exact moment it indicates that it did finally connect, then you need to go back to update the setting again). Most settings don't require a connection, but it is a minor annoyance. Most of your time will be spent reading, and of course your books are stored on the device and a connection is not required. Part of me wishes I'd bought the 3G model, because the browser is good enough that having lifetime free 3G wireless would be worth the extra money. Magazines don't look very good and are not very easy to navigate. There is minor glare in some lighting conditions, mostly when a lamp is positioned behind the reader's head.

The bad:
The contrast is fair to poor in dim light. It is much easier to read a printed page in dim light. In good light, contrast is on par with a pulp paperback. In dim light it feels almost like reading from an old Palm Pilot (resolution is better than an old Palm, but contrast is bad in dim light). The screen is small enough that the frequency of page turns is pretty high. Even in good light, the light gray background is less pleasant than the eggshell background of a printed page. You must tell it to sync before you switch it off, if you expect the feature allowing you to pick up where you left off using other devices to work correctly. The copy protection prevents you from using the files on anything other than Kindle software or devices.

Overall impression of the Kindle Wireless Reading Device Wifi is good or you can check on Ereader Comparison Chart.