A picture display system having two display devices and a base device for supplying picture signals to one of the display devices and capable of having bidirectional communication with the other display device is disclosed. The mug body includes a base and an upstanding wall. The pillowcase has a hook-and-loop closure that is used to adjust the pillow’s firmness and thickness. Such skin treatment modules like epilator, shaver, exfoliation or abrasive module, suction head, and massage head apply a mechanical action to the skin. Some micro-reflectors 19 in each of areas ARA to ARC may be arranged as to be directed to an adjacent input portion. A related installation method includes: joining the light assembly cradle with a vehicle, and aligning the lamp assembly so that it focuses light on a pathway of the vehicle.