Features: 1. The development board has 20 digital input and output interfaces, 7 PWM interfaces and 12 analog input interfaces. 2. Uses a separate USB-Serial converter chip compared to other versions, featuring a single-chip solution with Atmega32u4 for USB communication and control, helping reduce component count. 3. Atmega32u4's native USB support enables the board to emulate a mouse or keyboard, expanding application possibilities. 4. Compatible with Arduino IDE 1.01 or higher for use with Arduino Leonardo. 5. Designed for ease of use and durability. 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