Yes, there are dual portable cassette players.
Yes, there are portable cassette players with digital displays. Check online for the biggest selection.
Any pool table that is constructed to be portable is generally considered a toy, not a pool table. A pool table has to be extremely sturdy, has to be perfectly level in all directions, and have a very hard and consistent playing surface. There simply are no materials yet developed that do this for a pool table. The portable will not help in learning or practicing cue ball control, bank shots, and may be questionable for other shots as well. It does give the opportunity to practice developing a good stroke, which is the most important part of a pool game - so it can serve a useful purpose.
The Panasonic SW967 Shockwave Water-Resistant Portable CD / MP3 Player with D.Sound Technology is a good water proof portable CD player that you can buy off from Amazon.
Yes there are portable CD players that also play cassettes, but are only found in boombox styles.
no - I did not find any water proof cd players
Anyone can buy portable DVD players online, it is not hard to find and also cheap to buy. You will find a huge range of quality portable DVD players at a cheap price on Amazon almost any day.
You will need to purchase full sized headphones seperatley,portable CD players come with mini headphones.
I am sorry there are no portable CD players that hold more than 6 disc available.
Yes, any standard set of headphones should plug into a portable cassette player.
Some portable cassette players are waterproof. The fully submersible Swimman works to ten feet and operates on 2 AA batteries.
Yes, most sony portable DVD players have USB input jacks. You can find however, many different types and styles of portable DVD players, so be sure to check the specific model that you want to buy.