Abstract: The present disclosure discloses a secured payment method and relevant device and system. The method includes: sending, by a user terminal, order information to a payment platform server, receiving, by the payment platform server, the order information sent by the user terminal, and sending prompt information to the user terminal; receiving, by the user terminal, the prompt information sent by the payment platform server, and sending verification information to the payment platform server; and verifying whether the received fingerprint information and the received identifier of the user terminal match stored fingerprint information and a stored identifier of the user terminal that are stored during registration of the user terminal, and if yes, performing a payment operation according to the order information.

Abstract: A radio navigation system for use with an automobile audio device is provided. The radio navigation system includes a positioning receiver having a modulation transmitter and receiving a positioning signal, wherein the modulation transmitter converts the positioning signal into a modulated signal and then transmits the modulated signal; a demodulation receiver mounted in the automobile audio device, receiving the modulated signal and converting the modulated signal into a voice signal to the automobile audio device; and an output device outputting the voice signal and the positioning signal.