The appearance is small and elegant, with a simple black square design. This device allows users to wirelessly transmit, play, and control o files via Bluetooth for compatible devices including iTouch. It supports all o files from Bluetooth-enabled devices. The standard 30PIN output port can be directly connected to a docking base or o line input port, delivering full power output without the need for additional line amplification. By connecting and disconnecting different transmitting equipment, users can switch o sources wirelessly without plugging or unplugging cables, eliminating the hassle of manually switching o connections. The device frees users from cable constraints, allowing high-fidelity music playback anywhere in the room without requiring the o source to be within one meter of the speaker. It supports Bluetooth 5.1 protocol, AAC decoding, and device authentication. It automatically identifies certified and non-certified o devices. Transmission distance is not less than 10 meters. Interface type is standard 30pin. Two indicator lights flash alternately when no connection is active; after successful pairing, the blue light flashes slowly. Product Instructions: Device name: I-WAVE Turn on the speaker and plug the product into the docking station. The front and rear LED lights begin to flash, indicating pairing mode and normal operation. The device is set to auto-pair by default. Turn on your Bluetooth-enabled device such as a computer, mobile phone, or other digital player, enable Bluetooth, search for available devices, and select I-WAVE to connect. Once paired successfully, the Bluetooth indicator lights flash slowly, confirming the connection is established and wireless playback is ready. During normal use, to switch to another playback device, disconnect the current Bluetooth connection from the source device (e.g., phone or computer), then pair with a new Bluetooth device. If connection fails, remove and reinsert the unit. Note: Only compatible with analog speakers. Not compatible with car stereo systems or digital speakers. 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 error allowance is +/- 1-3cm.