The LG 55UL3J-M Signage Display is a powerful and versatile public display with a 139.7 cm (55.0") screen. A physical resolution of 3840 x 2160 4K UHD and a 1,000,000:1 contrast ration deliver a clear and crisp picture. The display works with the LG One:Quick Share wireless screen sharing solution, and can also double as a virtual WLAN router for mobile devices.