MOBONE v2.1+EDR Car Bluetooth Device with Audio Receiver  (Black)

Insert the receiver into the speaker's USB interface, and the other end connected with the 3.5mm audio cable to the receiver and the LINE-IN interface of speakers. Open the Bluetooth-enabled mobile phone (or computer), and search the surrounding Bluetooth devices to find a device called find its pairing code is 0000, after the pairing is successful, the LED light will slow down. Then you can select the music via Bluetooth from a cell phone or computer, a great music will play from speaker.