Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si This board is designed with anti-reverse protection, which will not burn the components of the power amplifier board due to negligence to connect the positive and negative poles of the power supply. Newly added mute and standby control interface, humanized design, so that DIY enthusiasts can install applications more reasonably. The power input and speaker output end adopt high-current terminal block, which can use thicker wire to the demand for high power. Shield high current inductance to prevent mutual interference and better prevent external magnetic field interference. Ultra- radiator to that the high-power output can better dissipate the high temperature generated by the chip, performance, and better protect the service life of the chip. colour: as shown Material: metal Size: about 90x92x38mm Package Contents: 1 x Amplifier Board Module Only the above package content, other products are not included. Note: Light 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.