ITEM NAME:Dot Matrix Module 8*8 I2C Controller for Arduino LED Display Control Board Description: - This version of the LED backpack is designed for the 1.2" 8x8 matrices. - This backpack solve the annoyance of using 16 pins or a bunch of chips by having an I2C constant-current matrix controller sit neatly on the back of the PCB. - The controller chip takes care of everthing,drawing all 64 LEDs in the background. - All you have to do is write data to it using the 2-pin I2C interface. - There are two address select pins so you can select one of 8 addresses to control up to 8 of the these on a single 2-pin I2C bus(as well as whatever other I2C chips or sensors you like). Specification: - Size: approx. 40 x 32 x 12mm / 1.57 x 1.26 x 0.47inch Package Included: 1 Piece 8*8 Dot Matrix Module.All you have to do is write data to it using the 2-pin I2C interface. 1 Piece 8 8 Dot Matrix Module.