The appearance is small and elegant, with a simple black square design. This device allows users to sit up to 10 meters away and easily wirelessly transmit, play, and control audio from Bluetooth-enabled devices such as smartphones, tablets, and other audio players. It supports wireless transmission of all audio files from any Bluetooth device. The standard 30PIN line output port can be directly connected to a speaker base or an audio line input port. The output level is sufficient to deliver full power audio without the need for additional line amplification. By connecting and disconnecting different transmitting devices, users can switch audio sources wirelessly without plugging or unplugging cables, eliminating the hassle associated with traditional audio equipment. This device frees users from the constraints of wired connections, allowing high-fidelity music playback anywhere in the room without requiring the audio source to be within one meter of the speaker. Supports Bluetooth 5.1 protocol, A2DP, and device authentication. Automatically identifies compatible and non-compatible audio devices. Transmission range is up to 10 meters. Interface: standard 30PIN. Two indicator lights flash alternately when no connection is established; blue light flashes slowly once connected. Product Instructions: Device identification: I-WAVE Turn on the speaker and plug the product into the docking station. The front and rear LED lights will begin to flash, indicating pairing mode and normal operation. The device is factory-set to automatically reconnect; ensure the Bluetooth device is powered on before pairing. Once in pairing mode, enable Bluetooth on your computer, smartphone, or other Bluetooth-enabled digital device. Search for available devices and select "I-WAVE" to connect. After successful pairing, the Bluetooth indicator lights will flash slowly, indicating a successful connection. Wireless audio playback can now begin. During normal operation, to switch to another playback device, disconnect the current Bluetooth connection from the source device (e.g., phone or computer), then pair with the new device. If connection issues occur, remove and reinsert the device. Note: - Supports analog speakers only; digital speakers are not supported. - Not compatible with car stereo systems. - Not compatible with digital speakers. Color: Black Material: Plastic Size: Approximately 44 x 35 x 7 mm Package Contents: 1 x Bluetooth Receiver Transmitter Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 1-3 cm.