A display includes a base, a display panel, and a rotation device for making the display panel horizontally rotate relative to the base. The rotation device includes a ratchet wheel movably connected to the base, a rod rotationally connected to the ratchet wheel, a pawl rotationally connected to the rod and engaging with the ratchet wheel, a first elastic member connected between the rod and the pawl for supplying a restoring force to the pawl, a second elastic member connected between the base and the rod for supplying a restoring force to the rod, a slide member slidedly connected to the rod for swinging the pendulum rod, and a third elastic member connected between the slide member and the base for supplying a restoring force to the slide member. The display panel is fixed on the ratchet wheel and rotates as the ratchet wheel is rotated.