It completely solves the incompatibility and instability of 2560 boards on win7 and win8 .While keeping the main control chip ATMEGA2560-16AU unchanged, the usb chip 16u2 was replaced. The project team launched products using ATMEGA8U2 and ATMEGA16U2 versions with their own ideas. In applications, these USB interface It is only used as a serial port "brush" and communication. Using a professional usb chip can not only reduce the cost, but also meet the application .CH340G replaces ATMEGA16U2Microcontroller: ATmega2560Working voltage: 5VCH340G replaces ATMEGA16U2Microcontroller: ATmega2560Working voltage: 5VInput voltage (recommended): 7-12VInput voltage (limited): 6-20VDigital I/O pins: 54 (15 of which PWM outputs)Analog input pins: 16DC current per I/O pin: 40 mADC current at 3.3V pin: 50 mAFlash: 256 KB, of which 8 KB is for bootloaderSRAM: 8KBEEPROM: 4KBClock Speed: 16 MHzMaterial: PCBcolour: bluePackage Contents:1 x Development BoardOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.