KOOKYE ATmega32U4 Microcontroller Game Programming Module Board for Arduino Esplora With onboard sound and light outputs Microcontroller: ATmega32U4, Operating Voltage: 5V Flash Memory: 32 KB of which 4 KB used by bootloader. SRAM: 2.5 KB - EEPROM: 1 KB Clock Speed: 16 MHz Package includes:1x Arduino Esplora Board, 1x USB cable