this be the 5 Koss product I have purchase , they have a lifetime warranty on they headphone , and I have use that warranty and be send a newer , better model , after own my headphone for 3 year . I also have a portable CD Player , Sports\/Armband Radio , a Clock\/CD\/Radio , and a boombox , all of the item have exceed my expectaton , and I have have great customer service . I will continue to purchase Koss item whenever possible . I look at alot of other Home Theatre Sysatems , and be skeptical of this one on price alone , but it far exceed my expectation , and work perfectly . it be also far les expensive that most of the other system I be consider .