ITEM NAME:HW-848 STM32F401 Development Board STM32F401CCU6 STM32F4 Learning Board Product Description Description: HW-848 STM32F401 Development Board 256KB ROM STM32F401CCU6 STM32F4 Learning Board Feature: - Maximum frequency 84MHz - 64KB RAM, 256KB ROM - Configurable up to 36I / O - 25MHz high speed crystal oscillator and 32.768kHz low speed crystal oscillator - Factory flash program Specification: Packing size: 100mm * 60mm * 4mm/3.94*2.36*0.16" Package weight: 8g Note: 1. There may be slight size deviations due to manual measurement, different measuring methods and tools. 2. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. Included: 1 X Development Board.The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. Warranty Service. - 64KB RAM, 256KB ROM. - Maximum frequency 84MHz. If item is defective after 3 months, you can still send it back to us.