The rose vibrator is a device that uses a motor

The rose vibrator is a device that uses a motor to create vibrations. The motor is powered by a lithium ion battery, which charges using a power supply. The vibrations are created when an aluminum wheel inside the rose vibrator rotates very quickly, creating friction and heat. As it heats up, the wheel expands and contracts due to its expansion coefficient—like how iron fills with water as it cools down—and pushes against the walls of its enclosure. This causes those walls to vibrate at high frequencies (or oscillations), which we perceive as sound waves in the air.[1] As such, this movement causes us to perceive these sounds as pleasant sensations!