Chip model: AT90USB1286. This is a microcontroller development and learning board. It includes a pre-installed bootloader, enabling direct application code upload via a standard USB interface. Ideal for beginners. Usage: Teensy Loader software can be downloaded from the official source. No driver installation required. Supports erase, program, and verify functions directly. No additional programmer hardware needed. Compatible with the Teensy development environment in supported IDEs. Key Features: - USB-capable AVR processor - 16 MHz clock speed - Single-button programming - Easy-to-use Teensy Loader application - Compatible with Windows, macOS, and Linux - Compact size, suitable for various projects Color: Green and black Material: Metal and plastic Dimensions: Approximately 51 × 18 mm Package Includes: - 1 × Teensy 2.0++ USB AVR Development Board - 1 × USB cable Note: Screen and lighting conditions may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 mm.