This is similar to how voice coils work in speakers

A rose vibrator is a sex toy that uses electricity to create vibrations. It's similar to other vibrators, except it looks like a flower and has the word "rose" in its name. Vibrators are used by women (and some men) during masturbation or partnered sex play as an alternative to manual stimulation of their clitorises, vulvas and vaginas. A vibrating device can help you reach orgasm more quickly than manual stimulation alone because it gives your clitoris additional stimulation. The rose vibrator contains an electric current which creates vibrations. The electricity passes through a coil of wire to create magnetic fields, which then move the magnets and create a vibration. This is similar to how voice coils work in speakers, except the magnets are smaller and closer together, allowing for more control over the vibrations.