- Compact 0.91 Inch OLED Display: This 40-pin Raspberry Pi HAT type expansion board features a 0.91-inch OLED display that connects via the I2C pin. Easily customize display information through programming, making it perfect for monitoring sensor data or system status. - Efficient Heat Dissipation: Equipped with an ultra-thin 4007 silent fan, this board ensures optimal cooling for your Raspberry Pi projects. Prevent overheating and extend the lifespan of your components. - Customizable LED Indicators: The board includes four programmable LED lights on the back. Control the lighting modes through simple programming, allowing you to create visual alerts or status indicators tailored to your needs. - User-Friendly GPIO Expansion: Designed with a 40-pin GPIO interface for easy access, this HAT board maintains compatibility with previous designs. The innovative fixing method minimizes the risk of short circuits caused by metal parts and enhances overall aesthetic appeal. Use Cases: 1. Monitor environmental conditions by connecting sensors and displaying real-time data on the OLED screen. 2. Create a custom alert system using the programmable LEDs to indicate various states or conditions of your project. 3. Build a compact, efficient Raspberry Pi project that requires both visual feedback and effective cooling solutions. This expansion board combines functionality and practicality, making it an essential addition to any Raspberry Pi setup.