A. The appearance is small and elegant. The overall appearance is a simple black square. Through this device, users can transmit, play and control audio wirelessly up to 10 meters away for iTouch via Bluetooth, or all audio files in the Bluetooth device. B. The standard 30PIN line output port can be directly connected to the base's audio line input port, and the output level enables the audio to reach full power output without additional line amplification. C. By connecting and disconnecting different transmitting equipment, the function of audio source switching without wiring and minimal plug - unplugging can be realized, which reduces the need for plugging and unplugging the cable for audio equipment to switch the audio source. D. It releases the constraint of the connecting line, allowing users to enjoy high - fidelity music anywhere in the room without having to place the audio source device within one meter of the speaker. E. It supports the Bluetooth 5.1 protocol specification, Lingo protocol and device authentication. It can automatically identify certified and non - certified base audio. The transmission distance is not less than 10 meters. The interface is a standard 30pin interface. Two indicator lights flash alternately when there is no connection, and the blue light flashes slowly after connection. F. Product Instructions: 1. Equipment identification: I - WAVE 2. Turn on the speaker, plug the product into the docking port, and the front and rear LED lights start to flash, indicating that it has entered the pairing mode and the device is working normally. Since the machine is factory - defaulted to pair automatically, turn it on to pair with the Bluetooth device. 3. After the device enters the pairing mode, turn on the Bluetooth function of digital products such as computers and mobile phones with Bluetooth output function, search for or find the Bluetooth device, and find the I - WAVE Bluetooth device to connect. 4. After the pairing is successful, the front and rear Bluetooth lights will flash slowly, indicating that the connection is successful, and you can play audio wirelessly. 5. During normal operation, if you want to change the playback device, you need to interrupt the connected Bluetooth output devices such as computers and mobile phones, and then pair and connect with other Bluetooth devices. If you cannot connect, remove the product and re - insert it. G. Note: 1. Only analog speakers are supported, digital speakers are not supported. 2. This item is not compatible with car stereo systems. 3. This item is not compatible with digital speakers. H. Colour: black I. Material: plastic J. Size: about 44x35x7mm K. Package Contents: 1 * Bluetooth Receiver Transmitter Only the above package content is included, other products are not included. L. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement error is around +/- 1 - 3cm.