Features:1. The development board has 20 digital input and output interfaces, 7 PWM interfaces and 12 analog input interfaces.2. Using a separate USB-Serial converter chip compared to other versions, this product is innovative with a single-chip solution. Only one piece of Atmega32u4 was used to implement USB communication and control. This innovative design reduces costs.3. Atmega32u4's native support for USB features also allows the development board to be modeled as a mouse and keyboard, greatly improving the application.4. A new version for Arduno IDE 1.01 or higher is required to use for Arduno Leonardo.5. Easy to operate, anti-aging, prolong service life.Specification:Condition: Item Type: Development BoardController: ATmega32u4Working Frequency: 16 MHzWorking Voltage: 5VInput Voltage (Recommended): 7-12VDigital IO Interface: 20PWM Channel: 7Analog Input: 125V Digital / Analog Interface Maximum Allowable Current: 40 mA3.3V Digital / Analog Interface Maximum Allowable Current: 50 mAFlash Memory: 32 KB (ATmega32u4) of which 4 KB used by bootloaderSRAM: 2.5 KB (ATmega32u4)EEPROM: 1 KB (ATmega32u4) Size: Approx. 68.6 x 53.3mm / 2.7 x 2.1inPackage List:1 x Development Board1 x USB Cable.Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin