Uno R3 ATmega328P with USB Cable length 1 feet, Compatible with ATMEGA16U2 Arduino (Color may vary) 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.Digital I/O Pins 14 (of which 6 provide PWM output).Analog Input Pins 6.DC Current per I/O Pin 40 mA.DC Current for 3.3V Pin 50 mA.Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader.SRAM 2 KB (ATmega328).EEPROM 1 KB (ATmega328).Clock Speed 16 MHz.