New Design Screen built-in fan which can drop temperature quickly, and keep your Pi Cool when working. The case is compatible with Rpi 4 perfectly. ^^ The screen connect with SPI directly, Physical resolution is 320*480 Pixel with resistive touch control. No additional Power. ^^ The Screen Support 125MHz SPI signal input, stable display without flicker, the refresh rate is about 50fps, enough to play the video and game. ^^ The screen need install driver, otherwise screen ONLY show white. If you dont how to install driver, Please try the Pre-install Driver System to test screen working statues