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

Input:
Question: what's the difference between 4.3 and 16.9 with  projected screens
Document: This screen came fast and does everything it is suppose to do. It is 4:3 NOT 16:9 as the title seems to suggest but the product description clearly says it's 4:3. the 16:9 is affordable as well at around $79.99. This screen is great. I will post pictures shortly.
My Favi 100&#34; 4:3 motorized screen died on me after less than 3 years of use. ;( Very frustrating. After this product got such great reviews I was a little nervous on taking a chance with a no-name brand screen but this turned out to be really nice! It wasn't as 'glossy' as the old Favi was.
I then ran the cable up where my chair is , (in the wall) and mounted the control unit there. The control wire has 4 conductors so to extend this you will need a 4 conductor cable or 4 wires to make the extension. Be sure you wire this correctly. The factory wiring has 1-Red ,1-Green, 1-White, and 1-Black within the jacket. Very important to wire it correctly. Once completed it was time to test ! Worked flawless !
I read all the Amazon reviews for this screen before placing my order, because I could not believe the price. Since most reviews were positive, I bought the product. It was easy to install and works perfectly. The screen itself is brilliant white and reflects the projected images beautifully. I recommend this product to anyone who is looking for a first class projection screen at a very low price.
Run the screen up all the way and twist the yellow one counter clockwise slowly. The screen will retract as you twist. Obviously you should stop when it is fully retracted. 2) The screen was hanging slightly lower on one side than the other when it was fully retracted (about 1/2&#34; difference between the left and right). I ran the screen all the way down and slipped a business card between the roller and the screen so the screen holds it in place.
works well and is good valuescreen not highest quality, but great for movies and games not in HDno faults
works great
this is an 80 inch motorized screen for 86 dollars, with shipping, works as advertised and cleans up our conference room perfectly. We were so satisfied with the 1st unit, we ordered a 2nd for the training room.
it's a great size and the movies show great (I just need to upgrade my projector...it sucks!) The kids love to play their video games on it...
Worked great.loved it. Awesome. Arrived on time. Easy to assemble great picture. Easy to pit away. Great for the kids to usem
Answer: The shape, 4:3 shape is like the old crt tvs had, 9:16 is like lcd tvs or wide screen