MAX7219 Dot Led Matrix Module with cable

An 8 by 8 grid of red LEDs driven by a MAX7219 controller, which handles the multiplexing, brightness and refresh entirely in hardware so your Arduino simply sends the pattern you want. Bright enough to read across a room, which makes it useful for scrolling messages, simple animations and clock displays. Modules chain together over the same three pins to build longer displays. Controller handles all multiplexing and refresh in hardware; Chains with other modules over the same three pins; Software-controlled brightness across 16 levels; Bright enough to read across a room