Arduino nano 3.0

Features:

Automatic reset during program download
Power OK blue LED on the bottom
Green (TX), red (RX) and orange (L) LED
+5V to AREF jumper
Auto sensing/switching power input
Small mini-B USB for programming and serial monitor (cable not included)
ICSP header for direct program downloads
Power OK blue LED on the bottom
Standard 0.1” spacing DIP (breadboard friendly)
Manual reset switch

Specification:
Microcontroller: Atmel Atmega328-20AU
Operating Voltage (logic level): 5V
Input Voltage (recommended): 7-12V
Input Voltage (limits): 6-20V
Digital I/O Pins: 14 (of which 6 provide PWM output)
Analog Input Pins: 8
DC Current per I/O Pin: 40 mA
Flash Memory: 32 KB (of which 2KB used by bootloader)
SRAM: 2 KB
EEPROM: 1 KB
Clock Speed: 16 MHz

#datasheet