my trusty wire Sony headphone of 15 year finally die after someone roll over the cord with a chair with wheel ... I only use the headphone for practice digital piano at night . during the day i use my  jbl lsr4328p Powered Studio Monitors -lrb- 8 Inch , 220 Watts -rrb-  after look around for a budget friendly but highly recommend wireless -lrb- know that wire sound better , but for the ease of just be able to walk around tempt I -rrb- , I choose the Sennheiser r 120 wireless headphone . it do have mix review , but most be positive , so I go ahead and order it . it be a simple and solid design with on\/off switch , volume control , and tuning control . when do use it , just put it back on the cradle and you do not have to plug in anything . it fit pretty well , but sudden movement be not recommend , as it will surely fall of the head . after charge it overnight on its cradle , I be excite to use it . well , it be pretty obvious when it be not in the right frequency , so it be easy to find that one small area where it be the `` sweet spot . '' except , even the sweet spot be not so sweet . there be whole lot of static noise and it be very distracting when I be try to think while play . when I be play forte , it be as if the headphone 's try to protect my ear , it muffle the sound and no matter how hard I pound on the key , it feed no more than mezzo piano . it come back to normal volume after a loooong while of play really softly or nothing . it be very strange . I be only keep it around for when I absolutely need wireless headphone and be about to search for a new wire headphone .