Features: Multi functional development board: This product is a multifunctional development board that supports various experimental applications such as keyboard, mouse, ISP, and USB flash drive, meeting different development and testing needs. Teensy 2.0 USB AVR: Using the Teensy 2.0 USB AVR chip, it has high performances processing capabilities and stable USB connection, reliably supporting various application scenarios. Powerful scalability: Supports rich interfaces and pins, making it convenient for users to expand and customize their functions according to their own needs. Easy to use: Provides a friendly development environment and a simple and easy to understand programming language, allowing users to quickly get started and implement various functions. Strong compatibility: It has good compatibility with mainstream operating system and software, and can be developed on multiple platforms such as Windows. Specifications: Item: Development Board Chip：Teensy 2.0 USB AVR Chip Chip Model：ATMEGA32U4 Size:as Pictures Package Includes: 1 Set Teensy 2.0 USB AVR Development Board note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you