Work Well but Be Careful that Bottom doesn't Come off When attached to Keys or Bag
Worked well for me while at my son's rock concerts and decent for him as a musician. I like the fact that gave it handy clipped on my bag.  The only thing was I had to buy a second set since the bottom somehow can unscrewed or popped off so I lost the ear buds and half of the metal case.
Rating: 4 stars