specifications :
microcontroller : Atmega328p/Atmega 168
operating:5v
input voltage : 7-12v
digital I/O PNS: 14
PWM: 6 out of 14 digital pins
max. current rating : 40mA
USB: mini
analog pins: 8
flash memory: 16KB or 32KB
SRAM: 1KB or 2kB
Crystal oscillator: MHz
EEPROM: 512bytes or 1KB
USART: Yes