Mini, and portable design. Easy to use by connecting directly 30 pin dock to transform your speakers into a fashionable wireless Bluetooth speaker. Long distance to play your favorite in your device through a Bluetooth connection. Comply with Bluetooth 2.0, support A2DP V1.0, V1.2, V2.0, V2.1, V3.0, V4.0 , plug and play. Music borderless, music wireless. Enjoy high fidelity music at any place indoor by wireless control. Color: black Package List: 1 * Bluetooth Music Audio 30 Pin Receiver Interface/port: Standard for 30 pin interface Output: 30 pin audio output Transmission rate: 3(Mbps) Transmission distance:>10m Bluetooth name: DL - LINK Password: 0000 Item size: 4.2 * 3.6 * 0.8cm / 1.65 * 1.41 * 0.31in (L * W * H) Item weight: 11g / 0.38oz Operation steps: 1.Turn on the stereo, insert the device into the dock, if the blue & red LED light twinkles very quickly, it means that the device is in the matching mode and operating well. 2.Turn on the Bluetooth function of computer, mobile or other device which has Bluetooth function, searching for the Bluetooth name "DL - LINK" to connect and input: 0000 for matching when the device is in the matching mode. 3.The blue light slowly after matching successfully, and it could be played the wireless music. 4.If you want to change the player when the device is working, it should be disconnected from the computer or mobile which in use and re-matching the other Bluetooth devices. Remove the device and reinsert into docking if connecting failed.