As the title suggests, I am disappointed by the brand that I used to products of very good quality, on any devices where the headphones are connected, we hear sizzling embarrassing and when I branches on a phone / smartphone, there are many bugs as the launch of random music, the volume is changing itself, movies are pausing, all without asking something! In conclusion: I am very disappointed and I would not recommend it at all PS: this is not a problem with MY headphones, I sent them back and it's always the same thing, some knowledge also have these problems.