Philips Noise Cancelling Headphones - Black

UPDATE: After three weeks of working with them and testing them to see if I could get the noise cancellation to show some sort of operation, (only changing batteries, connecting to different music sources) the headphones completely stopped working, hence the reduction from 4-Stars to 1-Star. I tried the second pair I had purchased at the same time and they were DEAD OUT OF THE BOX - Do not buy these, they are JUNK! I immediately tested the noise cancelling abilities of these headphones. It did not work at all, lights did not come on as described by the specifications. I removed the battery that came with the headphones and put in a brand new fresh battery. Lights came on but the cancellation did not function. For standard headphones they have good comfort and OK sound quality, but they do not cancel the ambient room noise! I boxed these back up and bought another brand that does work!