These clamps have 8 speeds! That's 8 levels of vibration for you and your nipples. I really liked that you could tighten the clamps up or loosen them however if you have smaller/shorter nipples (I do! I had no idea!) then this isn't the toy for you. Multi level pleasureable pain! Very fun to clamp each others' nipples or your own for self play. This is a great item for people who like that bit of pain!