Operation is super simple. Regarding disigne: a little big but if done quickly. Regarding the sound: simply bleuffant a bass outstanding !!! Regarding the scope: test with my xperia z displacement in such a home without loss or degradation of its connections to 100m2 info on 2 levels, testing also with my tablet xperia s no problem either. Tester exterior during my jogging in such a cuff nothing to say it works just as well. I highly recommend to all sports and amateurs.de good sound. Little more is a small storage pouch with.