(as of [price_update_date] – Details)
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.
Flash Memory: 32 KB (ATmega328P) of which 0.5 KB used by bootloader.
SRAM: 2 KB (ATmega328P), Operating Voltage 5V