I received FSL AL13 Aluminium Earphones in return for my unbiased review. FSL AL13 Aluminium Earphones are flat cable earphones. This flat cable doesn't tangle easily which is really nice when I'm doing housework while listening to music or when I go walking. They come with 3 adjustable sizes of rubber ear tips (small, medium and large). These tips are easy to take on and off. They are comfortable to wear. These earphones are compatible with any electronic device that uses a standard 3.5mm headphone jack. They fit in my cellphone, Acer laptop as well as other devices we have. These earphones have deep, booming bass. The sound is crystal clear and noise cancelling. I can sit in the living room with kids watching TV and I can listen to music without the outside noise. These are very nice, high quality earphones. You can check out more about FSL AL13 Aluminium Earphones @ http://goo.gl/g8VbaU.