Click board comes with the header strips soldered. 8x8 B LED click mikroBUS™. The Click accessory modules plug into the MikroBUS sockets in MikroElektronika microcontroller development boards.The 8x8 B Click features an 8 x 8 blue LED matrix with a serial interface. MAX7219 common-cathode display driver with serial I/O interface Analogue and digital brightness control Communication: serial SPI Power supply: +3.3V or +5Vdc