Instruction: Answer the given question using the supporting document.

Input:
Question: Can you leave the case on iPod to use this product?
Document: I originally bought this unit to dock my iPod nano which has a am/fm radio feature, but once I attached it, I got a message that said I needed to use headphones. This negates the point of the speakers. So I looked for my radio station on my iPhone and use it that way (after continually taking the phone out of its case). It was a little disappointing but I was pleasantly surprised at the great sound.
This is my kind of electronic product. It does exactly what it is supposed to do - recharge my iPod and allow me to listen without earphones - without requiring me to spend hours learning how to use it. I had it up and running in minutes. The controls are easy to understand and use. The speakers are of good quality.In short this is an excellent product.
I just removed my case while I dock it, and I am going to order a different case.Overall I am very impressed with this product, the alarm is very reliable and the sound quality is great. Just remember to reset the product once you get it in order for it to run and charge your iPhone 4. =)
First Class in every way! From initial order on Amazon to delivery, set-up and first play for my iPhone 3GS, the product has thus far exceeded my expectations. A carrying case for travel would be nice. I found it to be a little bulky for my carry on luggage, but ok.  Would definitely recommend this unit to anyone,
Great sound, long battery life, and very easy to port around. It's a little buggy with the iPod 5th generation device as it takes a few pushes of the buttons to get a response, and there's a delayed response after placing the iPod onto the docking port. The unit should also come with the remote control and carrying case for the cost, in my opinion.
Guess I will have to use the product on a daily basis if i get another one, to make sure it continues to work.
This product is great! Great audio! Easy to use and carry about. Doesn't take up much space. I have been thinking about getting one for a long time and I'm happy that I did.
Bought this for my daughter and this speaker module does a good job. The bass response is fine and the volume is sufficient to fill a room with clear sound. The controls are simple to use and the product is of quality.
This product is everything advertised. The sound quality is fairly good, it is compact and easy to use. The only drawback for me is that - i teach line dancing, and wanted to use it when teaching. Well, the sound just isn't loud enough for a room full of dancers. Otherwise it is a wonderful small system.
This is exactly what I wanted. The portability is great. I can use it in anyroom of my house or outside without messing with the power cord. The charge lasts for a long time and it quickly recharges. Sound quality is good too, expecially when the SRS is in use. Great product.
Answer: yes,  the docking port has been improved  and I can leave the protective case on and charge/play.  The older unit was not able to charge in the case.