1. Features a TYPE-C power supply port and supports a dual 5W Bluetooth amplifier board. 2. Easy to use with DC5V power input; compatible with power banks, standard chargers, fast chargers, and other USB power sources. 3. Supports 4-8 ohm, 4-inch and larger speakers; larger speaker size enhances sound quality, and various speakers can be easily connected. 4. Equipped with a PAM8403 stereo Class D audio power amplifier for high-efficiency amplification performance. 5. Built with high-quality components to deliver low harmonic distortion, high efficiency, and clear audio reproduction. Color: Black Material: Plastic + Metal Package Contents: 1 x Digital amplifier board Note: The package includes only the items listed above; other accessories are not included. Note: Lighting effects and display settings may cause slight variations between the image color and the actual product. Measurement error allowance is +/- 1-3 cm.