Features: 1. The development board has 20 digital input and output interfaces, 7 PWM interfaces, and 12 analog input interfaces. 2. Utilizes a separate USB-Serial converter chip, featuring a single-chip solution with Atmega32u4 for USB communication and control, offering an innovative and cost-effective design. 3. Native USB support from Atmega32u4 enables the board to emulate mouse and keyboard devices, enhancing application capabilities. 4. Compatible with Arduino IDE 1.01 or higher, designed for use with Arduino Leonardo. 5. User-friendly design with durable components to help prolong service life. Specification: Condition: Item Type: Development Board Controller: ATmega32u4 Working Frequency: 16 MHz Working Voltage: 5V Input Voltage (Recommended): 7-12V Digital IO Interface: 20 PWM Channel: 7 Analog Input: 12 5V Digital / Analog Interface Maximum Allowable Current: 40 mA 3.3V Digital / Analog Interface Maximum Allowable Current: 50 mA Flash Memory: 32 KB (ATmega32u4), with 4 KB used by bootloader SRAM: 2.5 KB (ATmega32u4) EEPROM: 1 KB (ATmega32u4) Size: Approx. 68.6 x 53.3mm / 2.7 x 2.1in Package List: 1 x Development Board 1 x USB Cable Note: Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Slight dimensional differences may occur due to manual measurement.