Abstract: A fin-shaped antenna apparatus for vehicle ratio application is electrically connected to a wireless receiver circuit and receives a radio signal. The fin-shaped antenna apparatus includes a fin-shaped cover, an AM antenna, a signal amplifier circuit board, an FM resonance circuit on the signal amplifier circuit board and a metal base. The AM antenna is separated with the FM resonance circuit. The FM resonance circuit comprises a plurality of inductors to form a resonance circuit and is connected to a metal base for enhancing the signal reception thereof. Therefore the signal quality for vehicle ratio application is enhanced.

Abstract: A color-changing bulb for an instrument panel of a vehicle, which is made as a bulb and directly installable in a bulb seat of the instrument panel is provided. The color-changing bulb includes a bulb housing defining a receiving space for receiving a light emitting diode and a circuit board. The light emitting diode includes three-color LED chips for generating red, green and blue light components. A controlling circuit is disposed on the circuit board and connected with the light emitting diode for driving the three-color LED chips to emit light. By use of a brightness adjustment switch on the instrument panel or the headlight switch, at least seven combinations of colors of light can be variably emitted to provide illuminating effect.