Microcontroller: ATMEGA2560-16AU

USB to TTL chip：CP2102

Operating Voltage: 5V

Input Voltage (recommended):DC 7-12V

Digital I/O Pins: 54 (D0-D53)

PWM Digital I/O Pins：15(D2-D13 D44-D46)

Analog Input Pins: 16(A0-A15)

DC Current per I/O Pin: 20 mA

DC Current for 3.3V Pin: 50 mA

Flash Memory: 256 KB of which 8 KB used by bootloader

SRAM: 8 KB

EEPROM: 4 KB

Clock Speed: 16 MHz

 LED_BUILTIN:D13