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. USB can be any type of device;AVR processor, 16 MHz;Single pushbutton programming;Easy to use Teensy Loader application Compatible for ;Free software development tools;Works with , Linux & ;Tiny size, for many projects Available with pins for solderless breadboard Color: picture color Material: PC + metal Package Contents: 5 x Teensy 2.0++ USB AVR Development Board 5 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.