Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: What's the difference between the HMZ-T3 and HMZ-T3W?!!
Document: I got my HMZ-T3W from the Sony Store, but I must assume it is the same version being sold here. Amazon's product description, at least, is for the HMZ-T3W at the time of this writing.Pros:+ Compatible with most eyeglasses, including mine. Nearsighted people with glasses will need to wear them with this.+ Does not even touch your nose if you don't want it to.+ Wireless worked perfectly for me, but you can alternatively connect the battery pack to the processing box via HDMI and use it wired.+ Privacy.
Received Sony HMZ-T3W yesterday. Easy set up when connecting directly to IPAD AIR and viewing a movie. Personally, the setup was easy and had no issues at all. I would recommend you charge before using as out of the box the battery charge is low. Great picture quality and sound. It is hard to believe that technology is so advanced.I did not have any issues with discomfort and I was able to adjust very quickly in order to get the right angle for clear picture.I could not put this down as I enjoyed watching a movie on the device.
Other people are unable to see the screens while you are wearing it, even if they try to peek around your head.+ Included earbuds sound good and feel high quality.+ Includes lots of extra rubber earpieces for the earbuds (different shapes).+ Compatible with most other headphones via the 3.5mm jack+ 3 HDMI inputs. You can switch between them with the on-screen menu or by pressing the INPUT button on the processing unit.+ Reasonably light weight. The T3 is the lightest Sony HMZ head-mounted-display yet.+ 100 - 240V power supplies, meaning they can be used in most other countries without converting voltage.+ Looking down, you can see below the device pretty well, allowing easy usage of keyboard, mouse, gamepad, or remote control.+ Compatible with nvidia 3D technology for stereoscopic games and 3D movie playback.+ You can choose over/under and side-by-side 3D formats through the on-screen menu, or leave it on auto mode if the application explicitly supports 3D output.Cons:- Difficult to position the viewer to get a clear, sharp image across the entire screen(s).
Wonderful!! Wonderful!! Wonderful! !I loved the new generation of Sony T3W a lot, it's really amazing product with great value, the 2D and 3D are working perfectly and the adjustments are really friendly and not complected at all,The video game with this product will let you really feel that you're in action by yourself!I highly recommend everyone looking for great experience to get one and also recommend everyone buy this product to also buy this headphone for getting the full great experience (Bose QuietComfort 15 Acoustic Noise Cancelling Headphones - Limited Edition)
The new version of Sony HMZ adds WiFi streaming and some important design changes. Unfortunately, the hardware is still very expensive and has a poor vendor support.You can find the full review on your my blog - CitizenHD.pl.http://obywatelhd.pl/index.php/2014/02/28/sony-hmz-t3w-jak-sprawdza-sie-w-praktyce-wywiad-i-test-w-jednym/
So why didn't Sony just build this in? When would I ever NOT use the light guard? Its annoying to fit that thing in. This is the same issue the HMZ-T1 also had.4) 3D quality is good. As good as you will see with any 3D movie in a movie theater anyway.5) Audio quality is good. The included headphone are pretty decent, but the fact that you can use your OWN headphones is pretty amazing. Use a set of closed headphones with it. I'm using my Audio Technica A900s.6) Wireless setup is tricky.
No room needed for projecting anything either. It's just a headset.So having used it for a few days here are my thoughts:1) It takes a while to adjust the headset so that its comfortable. It is definitely lighter than the Sony HMZ-T1 but it still needs alot of adjustment.2) Picture quality is pretty amazing. I've used the Myvu Crystal viewer before so I've used these HUDs before, but these OLED screens are fantastic. Picture is bright and clear. Its like having a 75 inch TV in front of you, but you can still see the edges.3) Light guard is annoying to put on, and you pretty much always need to have it to block light.
Man oh man, where to begin. Right out of the box for something that's supposed to be wireless there are more wires required to operate this device then the first HMZ t1. There are way too many wires required and connected to actually use this device wireless, wires wires wires. I thought it was a joke at first I thought I had received the wired HMZ t3. But no sure enough it's the HMZ t3w. Once everything is connected I was ready to see the display I read many reviews on how it's better than the t1, no blurry edges sharper image better sound with the earbuds included, I was excited to see what was new and better, besides having a battery attached to the headset at all times and wires all over the place.
picture is excellent OLED makes a huge difference 1080 looks better, not on this machine it dosen,t . Still not the most comfortable setup but who cares when the picture is so good, use with my ps4 and way more with ps3 and xbox games like halo combat evolved anniversary in 3d is great doom in 3d for ps3 great it all looks better on this and im comparing it to my Christie 3d projector and epson 3d  that are excellent as wel.l  PLAY  BLACK  OPS 2 ON THIS PS3 IN 3D  ,movies are great too,
one can be installed on top (I like this one because it supports my forehead) and one from the bottom (Which I don't use because it really makes glasses tight on my nose and face)10 - Clips to attach the earphone cables to the glasses for better experience.11 - User quick guide.Note: you don't have to use all the above to play videos, you may either use the wireless transmitter to stream videos to glasses wirelessly or you may connect your PS3/DVD player directly to the glasses via the battery pack.------------------------------------------Generally the experience is beautiful and it is a device that truly covers the needs for home cinema and definitely not a prototype anymore.
Answer: The difference is that the T3W is wireless. You do not need to be directly connected to the base unit and you can plug your device directly in to the battery pack for portability.