ECOMGEAR(TM) USB Bluetooth Audio Music Receiver Adapter for PC Speaker Phones 3.5mm Stereo Can be paired to any bluetooth enabled devices, such as mobile phone, laptops, speaker and Bluetooth audio transmitter. Insert the receiver into the speakers 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 dmzmusic 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 ECOMGEAR(TM) is a trademark. All ECOMGEAR? products are exclusively distributed by itself. ECOMGEAR? trademark is protected by US Trademark Law.