Using this 16x2 RGB LCD Keypad HAT is a breeze. First, connect it to your Raspberry Pi 3B+ or 4B. Since the contrast adjustment function is removed, you don't need to worry about that step. The wiring connection is already improved, so you can quickly get it set up. Once connected, you can use the 5 push - buttons on the board to switch displays and configure functions for your data monitor or small operating platform. To play with colors, use the IIC interface to achieve 16 million color combinations for the LCD and adjust the backlight brightness. As for temperature, make sure to use it within the -20 to +70℃ range and store it between -30 to +80℃. Keep it away from water and dust to ensure its long - term performance. If you need more detailed information, check out the product wiki.