Features: Multifunctional design: This expansion board has a 2-inch LCD main screen and a 0.96-inch OLED dualsub screen, providing users with various display optionsand operation modes. Powerful compatibility: Designed specifically forRaspberryPi, it perfectly matchesforRaspberrypi and supports forRaspberrypi models, making it easy for users to expand and develop. Easy installation: Adopting a plug-in connection methods without welding, users can easily install and use it quickly. Highdefinition display: The mainscreen adopts a 2-inch LCD screen, with highresolution, bright colors, and clear and realistic display effects. The secondary screen adopts a 0.96 inch OLED screen, with highdisplay brightness, strong contrast, and more delicate images. Multi screen interaction: Users can display different content simultaneously through the mainscreen and secondary screens, achieving multitasking and information display Programmable control: forRaspberryPi GPIO, users can customize the program to control the screen display content and flexibly apply it to various projects and scenarios. Specifications: Size:approx 65x56mm/2.56x2.2inch MaterialPCB Communication：SPI+12C Chip: ST7789 chip for Main Screen Connect SPI SSD13105 Chip for 2 Sub Screens Connect 12C Features: The Expansion Board with 2inch LCD Main Screen and a 0.96inch OLED DualSub Screen Package Includes: 1PC Expansion Board note: Due to the problemsof lighting effects and shootingangles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment