KEYESTUDIO 3 Pcs I2C 8x8 LED Matrix HT16K33 Module for Arduino A/Raspberry Pi/AVR/STM32 &hellip; 8 rows and 8 cols LED matrix Driven by HT16K33 chip Access to I2C communication pins Occupy less IO ports of microcontrollers Easy connection and available for more experiment extensions Input volt: 5V Rated input frequency: 400KHZ input power: 2.5W Input curr: 500mA