4 Two pre-installed rechargeable AAA batteries (accessible in the right side headphone by pushing down the small catch at top above the ear cushion, and pulling off should you ever need to replace them. I purchased these for after I delivered my baby. hm hat Its a big large. I didnt want earbuds that stuck out 1/4" to 1/2" like many out there, and you can barely tell they are in your ears looking head on. hm hat Website needs to list correct length! hm hat Once I got the replacement discussed above, I let it sit in the box for a while as I did indeed get another headset as a replacement for it just to keep this one as a backup. Der Versand war super schnell und die gelieferten Kopfhörer sind super! Once I did that, it locked on and I was able to pump up the tire. hm hat Fits just about perfect. It could use just little more cushion though.
hm hat