The appearance is small and elegant, featuring a simple black square design. This device allows wireless transmission, playback, and control from Bluetooth-enabled devices such as iTouch, up to 10 meters away. It can play all o files from connected Bluetooth devices. The standard 30PIN output port connects directly to compatible base units or line input ports, delivering full power output without the need for additional amplification. By connecting and disconnecting different transmitting equipment, users can switch o sources wirelessly without plugging or unplugging cables, eliminating the hassle of manual cable changes. This frees users from wired connections, allowing high-fidelity music playback anywhere in the room without placing the o source within one meter of the speaker. Supports Bluetooth 5.1 protocol and includes support for Lingo protocol and device authentication. Automatically identifies certified and non-certified base o devices. Transmission range is at least 10 meters. Interface: standard 30PIN. Two indicator lights flash alternately when no connection is active; after successful pairing, the blue light flashes slowly. Product Instructions: Device Identification – Turn on the speaker and plug in the product. Front and rear LED lights will begin flashing, indicating pairing mode and normal operation. The device is factory-set to automatically enter pairing mode upon power-on. After entering pairing mode, 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 connection and enabling wireless o playback. During normal use, to switch to another playback device, disconnect the currently connected Bluetooth device (e.g., phone or computer), then pair with a new Bluetooth device. If connection issues occur, remove and reinsert the device. Note: Compatible only 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 allowed within +/- 1-3cm.