Microcontroller: ATmega328 (DIP package)
Operating voltage: 5V
Input voltage: No external power supply needed when connected to USB or external 7V~12V DC input
Output voltage: 5V DC output and 3.3V DC output
Clock speed: 16 MHz
Bootloader: Arduino Uno
Supports USB interface protocol and power supply (no external power source needed)
Supports ISP download function
Digital I/O pins: 14 (6 are PWM outputs)
Analog input pins: 6
DC current per I/O Pin: 40mA
DC current for 3.3V Pin: 50mA
Flash memory: 32 KB (ATmega328)
SRAM: 2 KB (ATmega328)
EEPROM: 1 KB (ATmega328)
Dimensions: 75 x 54 x 15 mm (2.95 x 2.13 x 0.59 inches)
Environmental Friendly: Complies with Rohs standards