ENERGY STAR® is the government-backed symbol for energy efficiency, providing simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. ENERGY STAR is the simple choice for energy efficiency, making it easy for consumers and businesses to purchase products that save them money and protect the environment. ENERGY STAR Samsung UN40D6400, 101.6 cm (40"), 1920 x 1080 pixels, Full HD, 3D, Wi-Fi Samsung UN40D6400. Display diagonal: 101.6 cm (40"), Display resolution: 1920 x 1080 pixels, HD type: Full HD. 3D. Native aspect ratio: 16:9. Wi-Fi, Ethernet LAN https://www.chipchick.com/2011/09/samsung-un55d6400-review.html The Samsung UN55D6400 is a 55-Inch 3D LED HDTV that packs in a 1080p resolution, a 5,000,000:1 Dynamic Contrast Ratio, but more on all of that later. The UN55D6400 is also a Smart TV that is a part of the 6400 series. That means it supports apps f... Lightweight, thin and sexy design, stunning visuals with vivid, lifelike color and motion, Smart TV apps extend the functionality of your TV, energy efficient, catalog of apps is always growing, On the pricier side, QWERTY remote costs extra – as does the USB WiFi adapter, search function is anemic, web browser is not available in the 6000 or 7000 series Samsung's UN55D6400 55-Inch 1080p 120Hz 3D LED HDTV isn't just smart, it's also a TV that manages to produce stunning visuals. And not only are its visuals a wonder to behold, but so is its ultra-thin chassis. That combined with the fact that it's als... http://www.techreviewsource.com/home-video-entertainment/samsung-un46d6400 The Samsung UN46D6400 is a 46-inch edge-lit LED LCD TV that has a really stylish design, excellent color quality and really good 3D picture quality. It is on the expensive side, unfortunately, and does suffer from glare because of its glossy screen... Stylish design, Very good image quality, Good 3D performance, Great selection of applications Pricey, Glossy screen shows reflections, No builtin WiFi networking https://www.cnet.com/products/samsung-un40d6400/review/ Samsung's UND6400 occupies an upper-middle-class station in the company's extensive LED-based LCD lineup for 2011. It's the least expensive model to deliver 3D, gets the full Smart TV suite of Internet options--except for the browser and QWERTY remote--an... The Samsung UND6400 series offers beautiful, compact styling with an ultrathin bezel and panel for a nearly all-picture look. It produces relatively deep black levels for an edge-lit LED-based LCD TV, with accurate color in bright areas, excellent video p... This Samsung LED TV is relatively expensive. Its picture suffers from imperfect screen uniformity and blue-tinged darker areas, while its glossy screen reflects a lot of ambient light. The UND6400's Smart Hub lacks Amazon Instant, its search is next to us... Solid overall 2D and 3D picture quality, as well as a wealth of features and beautiful looks, mark the Samsung UND6400 as one of the better edge-lit LED-based LCD TVs we've tested.