I use it for a day and I would not use more ...
The specifics I like most, is given with the EK3253 receiver. the least breath, the sound quality poor, the color that gives a filthy mix.
Of all the headphones I've heard is the worst, headphones walkman cassette '80s sounded better. I think it's a sensation of hearing the worst I have experienced.
good value for money as they are provided with receivers, but € 75 is quite excessive, the first prize at the fair search is best.