A haptic device includes a flexible holder; an elongated piezo bender supported at one end thereof by the holder; a mass supported by the elongated piezo bender and positioned at an end of the elongated piezo bender opposite the end supported by the holder; and an electrical driving signal generator configured to generate a signal to create a vibration in the elongated piezo bender. The styleswitcher captures viewing settings previously selected and saved by the user. The computer includes an infrared response unit, and the infrared response unit includes an infrared receiving circuit and a control circuit electrically connected to the infrared receiving circuit. A radius with the inner thread of the through hole is smaller than a radius without the inner thread of the through hole.