Abstract: An assistance device includes a main body, a first permanent magnet, a second permanent magnet, a coil, and a supporting arm. The main body can be configured to support an electronic device. The main body defines a receiving space. The first permanent magnet and the second permanent magnet are fixed in the receiving space. The second permanent magnet and the first permanent magnet cooperatively form a magnetic field. The coil is rotatably received in the receiving space. The supporting arm is fixed to the coil and rotatably coupled to the main body. The supporting arm is steady with respect to the surface when the main body is rotated with respect to the surface. The first permanent magnet and the second permanent magnet rotate with respect to the coil. The coil generates power for the electronic device at the coil goes through the magnetic field.

Abstract: A loudspeaker which is capable of attaching to an accessory of an electronic device. The loudspeaker includes a first panel; a second panel; a third panel; a fourth panel; a fifth panel; a sixth panel, wherein the first panel, the second panel, the third panel, the fourth panel, the fifth panel, and the sixth panel are each made of paper material and portray graphics in virtual three-dimensional. A first horn is attached on the inner side of the first panel and a second horn is attached on the inner side of the second panel.