Arduino Mega 2560 R3 ATMEGA16U2 Improved Version CH340G Board

package includes 

• 1x Arduino Mega board
  

Features:

• 54 digital input / output terminals (14 of which have programmable PWM outputs).
• 16 analog inputs.
• 4 UARTs (hardware serial ports).
• 16 MHz crystal clock.
• Operating voltage: 6 ~ 12v.
• Dimensions: 110 x 53 x 15 mm.