The appearance is small and elegant, featuring a simple black square design. This device allows users to wirelessly transmit, play, and control o from Bluetooth-enabled devices such as iTouch. It supports playback of all o files from connected Bluetooth devices. The standard 30-pin output port can be directly connected to a speaker base or line input port, delivering full power output without the need for additional amplification. By connecting and disconnecting different transmitting equipment, users can switch o sources seamlessly without rewiring or frequent plugging and unplugging, eliminating the need to physically change cables when switching devices. This frees users from cable constraints, allowing high-fidelity music playback anywhere in the room without keeping the o source within one meter of the speaker. Supports Bluetooth 5.1 protocol and includes support for relevant authentication protocols. Automatically identifies compatible and non-compatible base devices. Transmission range is up to 10 meters. Interface: standard 30-pin. Two indicator lights flash alternately when no connection is active; after successful pairing, the blue light flashes slowly to indicate connection. Product Instructions: Device Pairing: Turn on the speaker and plug the device 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 enter pairing mode upon power-on. To pair, enable Bluetooth on your computer, smartphone, or other Bluetooth-enabled digital device, search for available devices, and select "I-WAVE" to connect. Once paired successfully, the Bluetooth indicator lights will flash slowly, confirming the connection is established and wireless playback is ready. To switch to another playback device during normal operation, disconnect the currently connected Bluetooth device (e.g., phone or computer), then pair with the new device. If connection issues occur, remove and reinsert the device to restart the connection process. Note: Compatible only with analog speakers. Not compatible with digital speakers or car stereo systems. Color: Black Material: Plastic Size: Approximately 44 x 35 x 7mm Package Contents: 1 x Bluetooth Receiver Transmitter Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1-3cm.