Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Is the T-70 or the T-70 Pro the mobile version?
Document: I,  previously had access to DT 889-600 and 990-600. The 880s were comfortable but clamping force was slightly more than the other two. Sound was spacious and very enjoyable. The 990s had great sound as well. I was impressed with the build quality of all three headphones. All are manufactured in Germany of very fine materials. Only wish they made the cable detachable and replaceable. I received the T 70 Tesla headphone today. This is an  initial impression.
I had been looking for some headphones to use at work where my Senn HD650s were just a bit too noisy.These fit the bill perfectly. They have a neutral sonic signature and are very enjoyable to listen to. The velour ear pads keep my ears from sweating too much. You do have to have a reasonable headphone amp for the 250ohm version.
For bad example, you can look at the head band construction of AKG - K702. Looks ugly, bumps on the head band gives painful experience(I need to do some modifications to use this).Note: I also had Beyerdynamic DT770 pro. This headhand and ear pads looks similar, but these are not comfortable. There is lot of improvement in T70.Ear pad  size is also comfortable for me.
Bright and forward with excellent background noise cancellation. It cuts down about 70 percent of ambient noise and since I spend a lot of time writing in cafes, it fits me perfectly. Eventually I do plan to buy my first open-backed phones but not for now. Any feedback on the merits of openbacked cans would be welcome. Thanks alot.
I do not understand, how these high end headphones came on the market with such a flaw. On the other hand, I do not know how it affects the music. Ignorance is bliss. Do not worry about this and enjoy music.I also verified some other charts from "headphone.com". One thing that catch my attention is "harmonic distortion". Harmonic distortion is very high on T70p. But not on 250 ohm version of T70.
I am blown away by these. Very balanced sound and very little sound leakage. They sound much fuller with my MacBook, iPods, etc than the Beyerdynamic 250 ohm DT 880 Pro that I returned. It was a great headphone but it wasn't well matched to portable electronics. I owned other Beyerdynamic and Ultrasone headphones in the past that were very good. The T70P is better (at least for my usage with portable devices). I briefly tried the new Beats Executive.
And since selling all my other closed can's, I needed a back-up phone for when I travel with my wife. I recently tried the Monster beats pro, limited and the Sony MDR Z1000. The sony's were good, compact, durable looking, but had recessed upper mids and Treble; compared to my T5s. The Monsters were actually quite good. Anyone using them, they are no slouch. Clean, deep, good separation, decent soundstage, but a tight fit and heavy; good and bad.
Deep rich sound! high dynamic frequency range and easy to carry around (thanks to the case it comes with to protect the head phones)! That being said these things are a bit big and if you want to carry these things around you'll be needing a book bag! That aside I use these at the studio and at home there def not for listing to music off your mobile device while you walk around!
i bought it to replace my DT 770.Things i like:sound is very clean, spacious. I can hear more details and the timbre seems richer.weaknesses: the first one i got from Amazon had problems (hence one star down) but the replacement seems fine.Some people mention weak bass but i don't feel it, i can hear bass as part of music rather than just boom-boom.
You will get the WOW impression at first but will give you fatigue.
Answer: T70P. The P stands for portable. They have a 32 ohm impedance which means they can be driven buy most mp3 players without the need for an amplifier. I use mine with an iPhone and I have to say they are excellent headphones. Far superior to Dr Dre studio headphones