With this device you can make any speaker including your car home or even your computer speakers wireless. It will enable you to play Music directly from your phone to your speakers with high quality sound through your phone's Bluetooth. You do not have to throw away your old speakers just invest in this adapter and your old speakers will be bluetooth compatible. NOTE: That this device is powered by usb. You can put this device directly into a usb wall socket for it to work or any other USB port. Features: Lets ordinary speakers instantly become wireless Bluetooth stereo audio music speakers Can be paired to any bluetooth enabled devices, such as mobile phone, laptops, speaker and Bluetooth audio transmitter. Make any speaker play wireless music Instructions for use: 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 Specifications: Bluetooth Standard: Bluetooth V2.0+EDR, support A2DP V1.2 Power supply: 5V USB Output: 3.5mm Audio interface Distance: 5-10 meters Sound output rate: 44.1KHZ and 48KHZ Total weight: 15g Size: 55mm*20 mm*10mm. Color may vary.