Do you mean warranty? I don't know. They gave a long period of time in which you could return them if they proved unsatisfactory in any way, but you would have to ask Amazon or Sennheiser about warranty questions. I love my set and have never had any problems with them at all. Blessings, Antoinette
You would have to have them cranked pretty much all the way (or close) for sound to escape. it's much easier for external noises to be heard since these are not noise cancelling. I have used my set on airplanes, buses, trains, in all kinds of stores and not once have I have seen anyone and or been told anyone that they can hear my music.
Connection cable: Coiled cable (min1m/max 3m)
Contact pressure: 6 N
Ear coupling: Around-the-ear
Frequency response (headphones): 8 - 25,000 Hz
Jack plug: 3.5 / 6.3 mm stereo
Load rating: 500 mW
Nominal impedance: 64 Ohms
Sound pressure level (SPL): 102 dB (IEC 268-7)
Total harmonic distortion (THD): 0.1%
Transducer type: Dynamic, closed
Weight: 7.8 oz (220 g)
This product is amazing, everything you buy that is the only thing that really gave me a sound from another planet.
I don't see why not. They cut out a lot of the outside noise (I use it to play drums while listening to the music I'm accompanying. Normally I can't hear the music or I have to play it really loud, which just annoys everybody else in the house). The quality of sound is quite clear also, fairly transparent - but I don't think you'll care about that if you're DJ'ing. In fact, a cheaper set of headphones that blocks outside sound will probably do just as well.