This product is a serially driven 8x8 LED Matrix which powered by MAX7219.The 8x8 LED Matrix is easy to use and compatible with Arduino, only needs three data lines and two power lines. It can be used in lots of place like various types of electronic display panels. You can make your applications more vivid because of the LED brightness adjustment can be implemented in software. For the kit of this module, please see MAX7219 8x8 Matrix Display Module Kit - Red Dot