Chip model is AT90USB1286, microcontroller software development and learning the best experimental board, has been installed Bootloader program, you can directly download the application code through the common USB interface, very helpful for beginners. of use: teensy.exe can be downloaded directly from the Internet, no need to install the driver, direct erase, program, check. Do not need to buy another expensive burner. At the same time, you can use for IDE to install the Teensy development environment for use. Key Features: USB can be any type of device AVR processor, 16 MHz Single pushbutton programming Easy to use Teensy Loader application Compatible for Works with , Linux & Windows Tiny size, perfect for many projects Colour: green + black Material: metal + plastic Size: development board about 51x18mm Package Contents: 2 * Teensy 2.0 ++ USB AVR Development Board 2 * Line