Abstract: A wireless communication device is provided. The wireless communication device comprises a main body, an external antenna and a cushion washer. The main body includes a first connector. The external antenna includes a second connector detachably connected to the first connector. The cushion washer is sandwiched between the main body and the second connector.

Abstract: A smart home control system is provided. The smart home control system includes a first sensing unit, a control unit and a control center. The first sensing unit is electrically connected to a first electronic device. The first sensing unit senses a first state within a first region. The control unit is electrically connected to the first sensing unit. The control unit generates a sensing signal according to the first state. The control center is connected to a cloud system. The control center receives the sensing signal, and generates a control signal via the cloud system and transmits the control signal to the control unit. The control unit controls the first electronic device to be turned on or turned off according to the control signal.

Abstract: A digital painting pen includes a pen body and at least one sensor, which is disposed on the pen body and generates at least one sensing signal according to a condition while a user rotates or presses the digital painting pen, changes an angle of the digital painting pen against a plane, changes a holding position of the digital painting pen, or slides a finger to change a position of the finger on the digital painting pen, thereby changing a color, a brush type or a brush thickness of the digital painting pen. Accordingly, the present invention can change a color, a brush type and a brush thickness of the digital painting pen to achieve an instinctive drawing effect without using buttons and switches.