First of all Sennheiser MX270 is an in-ear headphones. It was my first Sennheiser Headphone.
It is especially designed for music lovers, who want to enjoy a descent bass with awesome sound under?1000. I got those in? 700 2 years ago!
I have an average height and this headphone have a descent length that it can reach to your ears from your pocket. Company has claimed 1.2 m( Be sure to check again)
This earphone is designed for music so you will not get any dedicated microphone in them. But because these headphones have no mic, that’s why almost most of the cellphones will support them. I used MX270 with Nokia Lumia 710, Nokia 500 and they played well. I even miss those pairs.
The Sennheiser MX 270 comes with L shape connector so be careful with it. My headphones lasted more than 2 Years but after that there was some problem with the L shape connector. May be because of shocks.
Overall I loved the bass and the sound, it was great for rock music. Also those pairs come with 2 Year warranty, So if you are new and are planning to buy them then you must definitely go for them.