Features: CH340MEGA2560R3 is forarduino development board core processor ATmega2560. It also has 54 digital input/output ports (of which 15 can be used as PWM outputs),16 analoginputs, a 16MHz crystal oscillator, a USB port, a power sockets, a CSPinterface, and a reset button. Product model: ATmega2560. Working voltage: 5V. Input voltage: 7-12V. UTvoltage: 6-20V. Analoginput pins: 16. Digital output input pins: 54 (15 of which provide pulse width debugging output). DCcurrent per input/output pin: 40mA. DCcurrent of 3.3V pin: 50mA. Memory: 256 kilobytes, of which 8 kilobytes are used by the boot loaderSRAM: 8KB. Current erasable read-only memory: 4KB. Clock speed: 16MHz. Specifications: Product model: ATmega2560 Working voltage: 5V Input voltage: 7-12V UTvoltage: 6-20V Analoginput pins: 16 Digital output input pins: 54 (15 of which provide pulse width debugging output) DCcurrent per input/output pin: 40mA DCcurrent of 3.3V pin: 50mA Memory: 256 kilobytes, of which 8 kilobytes are used by the boot loader SRAM: 8KB Current erasable read-only memory: 4KB Clock speed: 16MHz Package Includes: 1 x For UNO 2560 UNOR3 Nano Ultimate Starter Kit note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!