Intelligent reverse connection protection, power reverse connection will not damage the IC. The IC control circuit and the LED point share a power supply. The control circuit and the RGB chip are integrated in a 3528 packaged component to form a complete external control pixel. Built-in signal shaping circuit, any pixel point receives the signal after waveform shaping and then output, to that waveform distortion will not accumulate. Built-in power-on reset and power-down reset circuits. The three of each pixel can achieve 256 levels of brightness display, complete the full display of 16,777,216 colors, and the scanning frequency is not less than 400Hz/s. The serial cascade interface can receive and decode data through a signal line. When the transmission distance between any two points is less than 5 meters, there is no need to add any circuit. When the refresh rate is 30 frames per second, the number of cascades is not less than 1024 points. The data transmission speed can reach 800Kbps. The color of the light is highly consistent and cost-effective. Colour:white Material:plastic Package Contents: 400 * RGB Symphony LED 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.