The appearance is small and elegant. The overall appearance is just a simple black square. Through this device, users can wirelessly transmit, play, and control your for , for iTouch via Bluetooth. Or any audio files in the Bluetooth device. The standard 30PIN line output port can be connected directly to for base or for audio line input port, and the output level can make the sound reach full effect without additional line amplification. Through the connection and disconnection of different transmission equipment, the function of audio source switching without cables and zero plug-in and plug-out can be realized, saving the trouble of plugging and unplugging the cable of audio equipment to switch the audio source. Release the shackles of the connection line on , allowing to enjoy hi-fi music anywhere in the room without having to place the audio source device within one meter of the speaker. Supports Bluetooth 5.1 protocol specification. Supports Lingo protocol and device authentication. Supports automatic identification of certified and non-certified base speakers. Transmission distance: not less than 10 . Interface: standard 30-pin interface. 2 indicator lights flash alternately when there is no connection, and the blue light flashes slowly after connection. Product Instructions: Equipment Identification: I-WAVE Turn on the speaker, plug the product into the docking , and the front and rear LED lights will start to flash, indicating that it has entered pairing mode, indicating that the device is working normally. Since the machine is set to automatically , turn it on to pair the Bluetooth device. When the device has entered pairing mode, turn on the Bluetooth function of the computer, mobile phone, etc., and other digital products with Bluetooth output function, and search or find the Bluetooth device, find the Bluetooth device I-WAVE to connect, after the pairing is successful, the front and rear Bluetooth will flash slowly, indicating that the connection has been successful, and you can wirelessly. During normal operation, if you want to change the playback device, you need to disconnect the connected computer, mobile phone, and other Bluetooth output devices, and then pair and connect to other Bluetooth devices. If you cannot connect, please remove the product and reinsert it. Note: Only analog speakers are supported, digital speakers are not supported. This item is not compatible with for car stereo systems. This item is not compatible with for digital speakers.