Vibration motors are small electric motors that create mechanical vibrations of varying intensity. The motor has an unbalanced mass attached to its shaft, which causes the motor to vibrate when it is powered up. They are commonly found in mobile phones, vibrating game controllers, smoke alarms, and other devices. They are also used to provide tactile feedback in medical devices or robotics, allowing medical technicians to easily sense tension and other forces. Vibration motors are used in a variety of applications, including pulse massagers, industrial control systems, and electronic toys.