4K UHD Portable Monitor. 7" Portable Security Monitor Display Screen CCTV HDMI/VGA/AV for Raspberry Pi. 10.1" LCD Portable Monitor CCTV Video Display Screen VGA AV BNC HDMI USB Input. The 15.6" 4K portable monitor adopts a 16:9 screen proportion with resolution up to 3840 2160, 100% sRGB color gamut, 300cd/㎡ of brightness, 1000:1 contrast ratio, and 60HZ refresh rate, providing accurate and vivid images.