The TCL LE50UHDE5691 50" Class 4K ULTRA HD LED TV has an Ultra HD LED Display with a resolution of 3840x2160. That is 4 times the Full HD 1080p resolution. Enjoy Crisp and life like clear visuals with the 16:9 Cinema like aspect ratio. It also has 5000000:1 Dynamic Contrast Ratio with 1.07 Billion colors to give you mind blowing colorful visuals. The 4 HDMI ports and a USB port make it compatible with all your media devices. Feel every beat with the SRS TruSurround HD technology. The screen refresh rate on this HDTV set is 120Hz and it is ENERGY STAR certified.