Atmel CPU - ATmega328P-PU with optional bootloader. The ZBasic bootloader allows downloading with the ZBasic IDE (ZBasic Generic Target License required) while the Arduino OptiBoot Uno (0.5K) and Arduino Duemilanove (2K) bootloaders allow downloading with the Arduino (v1.0.2 or later) environment. The bootloaders are built for 16MHz operation. If ordered with no bootloader, the device will be shipped in "factory default" configuration.

Available Options:

Bootloader:
NoneArduino OptiBoot (+$2.00)Arduino Duemilanove (+$2.00)ZBasic Generic (+$2.00)