Stealkart USB Bluetooth Audio Stereo Receiver Wireless Handsfree Bluetooth Adapter Dongle Kit for Speaker for iPhone for car or Home Instructions for Use: 1. Insert the receiver into the speaker's USB interface. 2. Open the Bluetooth enabled mobile phone (or computer), and search the surrounding bluetooth devices to find a device called BT-DONGLE and then its' pairing code is 0000(if asked),after the pairing is successful, the led light will slow down. 3. Then you can select the music via Bluetooth from a cell phone or computer, a great music will play from speaker. Package Included: 1 x USB Bluetooth Music Receiver