3Pcs ATmega328P Arduino Compatible Nano V3 Improved Version No Cable Specification: Microcontroller Atmel ATmega328 Operating Voltage (logic level): 5V Input Voltage (recommended): 7V ~ 12V Input Voltage (limits): 6V ~ 20 V Digital I\/O Pins: 14 (of which 6 provide PWM output) Analog Input Pins: 8 DC Current per I\/O Pin: 40mA Flash Memory: 32KB (ATmega328) (of which 2 KB used by bootloader) SRAM: 2KB (ATmega328) EEPROM: 1KB (ATmega328) Clock Speed: 16MHz Note: This version is not included the USB cable. Had change the USB chip, improve the download speed and stability of WIN7\/WIN8 Package included: 3 x Arduino Compatible Improved Version Nano V3.0