The board is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs) 6 analog inputs a 16 MHz crystal oscillator a USB connection a power jack an ICSP header and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. For HW SW engineers development tools; Microcontroller: mega328P-PU; Working voltage: +5V; DC I/O current: 40mA; SRAM Static storage capacity: 1KB; EEPROM capacity: 512 bytes; Support ISP download