The scroll wheel is zowie 16 click. Im so glad I found this amazing belt! Anyway, I returned them and bough 3 pairs in different colours. After much consternation, I realized the bluetooth had connected to the headphones. Bluetooth- I easily connected to my Android and my IOS devices. I love these as they can get wet with no damage and they are nice and cool to wear in the warm weather. The sequins attached to the tassels will make dancing in this dress a lot of fun! Came in a cute blue bag that I can reuse, had those inserts in the toe to keep its shape and came with a cute thank you card and friendship bracelet. Took them on vacation and wore them all day. Comfortable fit for a 10 year old kid.