1. Use TYPE-C power supply port, support dual 5W Bluetooth amplifier board. 2. Easy to use, DC5V power supply, fully support power bank/general charge/fast charge and other power supply. 3. Support 4-8Q, 4-inch and above speakers, the larger the appearance, the better the sound quality, and various speakers can be easily matched. 4. PAM8403 stereo class D audio power amplifier can achieve high power amplifier performance. 5. Use high-quality components, with low harmonic distortion and high efficiency, to achieve high-quality sound reproduction. Colour:Black Material:Plastic + Metal Package Contents: 1 x Digital amplifier board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.