The DEV-12587 from SparkFun falls under the development boards & kits - avr category. This component is defined by a kits of AVR Here at SparkFun we refuse to leave 'good enough' alone. That's why we're adding to our line-up of Arduino-compatible microcontrollers once more! The Pro Micro is similar to the Pro Mini except with an ATmega32U4 on board. The USB transceiver inside. This part has a typical lead time of 107 Days from factory. Order DEV-12587 from Simplytronix for authenticated stock and same-day order processing.