I would like to comment on some item in the other reviewer 's review :  `` o no warranty ; no address or telephone number in packing material . try 800\/726 -3801 . ''  Mine ship with a warranty card and contact information .  `` o work only with remote control supply ; no universal remote code so now I have one more clicker to kepp track of ''  that depend on the type of universal remote you have . you be correct though , most universal remote do not have a code for Koss . `` o tiny speaker supply with unit have a tinny sound ; ''  I think the sound on the unit be terrific . I certainly have no complaint .  `` o if you switch from dvd to tv , dvd revert back to start of disk . a major pain as now you have to sit through a minute plus of start-up material . ''  i agree , this be a major pita . and the reason I give it four , instead of 5 star .  `` o lack a mute button . oh thos enoisy commercial ''  my remote have a mute button , and it work . I think you should read the manual or look for the speaker with a line through it on the remote . : - -rrb-  overall I think this be a wonderful unit for the price . it be only slightly more than a standard dvd player . the unit also play mp3 , and have AM and FM tuner as well . what a happy surprise that be !