Problem to be solved: to provide a multi-function handle which can be transmitted using a speaker switch line of an automobile.Solution: a voltage switch circuit of the rear end and a voltage stabilizing circuit comprising a resistor and a diode in the power supply circuit, and a signal of a key switch set are encoded and A digital signal generator for decoding and converting to a series of series signals, provided at an appropriate location of the vehicle handle, and a key switch set that allows the user to directly control the correlation facility on the handle The power supply line and the signal transmission line are connected to the speaker control circuit of the steering wheel.
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