Specification: Origin: Mainland China Product options: Without Cable, With Cable (optional) Product chip: CH340G Working voltage: 5V Input voltage: Recommended 7-12V, limited to 6-20V Digital I/O pins: 54 (15 of which provide PWM output) Analog input pin: 16 DC current of each I/O pin: 40MA DC current of 3.3V pin: 50MA Flash memory: 256KB, of which 8KB is used by the boot loader SRAM: 8KB EEPROM: 4KB Clock speed: 16MHZ Size: About 101.2x53.3mm/3.98x2.09inch (measured manually) Weight: 36.6g (measured manually) Usage method: Plug in the 2560 development board and the driver will automatically install Select board MEGA2560 in die Select the COM port, which can be checked on my computer. Just now, the port in your 2560 development board First, select the routine program that comes with Ard and burn it in Mega's power supply system has two options: USB direct power supply or external power supply. The selection of power supply will automatically switch. External power supply can choose from AC to DC adapter or battery. The limit voltage range of this control board is 6V~12V. However, if the provided voltage is less than 6V, the I/O port may not be able to provide a voltage of 5V, resulting in instability; If the voltage provided is greater than 12V, the voltage regulator may experience overheating protection and more likely damage to the MEGA. Therefore, the recommended operating power supply is 6.5-12V, and the recommended power supply is 7V or 12V. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Development Board (Without/With Cable) 1. Compatibility: The Mega2560 R3 solves the compatibility issues and instability problems with the traditional 2560 board in WIN7 and WIN8 systems. 2. Upgraded USB Chip: The Mega2560 R3 replaces the USB chip 16U2 with ATMEGA8U2 or ATMEGA16U2, which significantly reduces costs while providing superior application performance. 3. Enhanced ISP FLASH Capacity: With the new ATMEGA16U2 chip, the Mega2560 R3 can offer an increased ISP FLASH capacity, making it easier to expand its functionality and support more advanced development needs. 4. Versatile USB Interface: The ATMEGA16U2 chip not only offers traditional USB-to-serial port functionality but also allows users to customize additional features such as configuring USB ports as mice, keyboards, gamepads, cameras, etc.