Products you can control through Echo and Alexa-enabled Devices. Y F means that the product is rated in its category in terms of energy efficiency. The Energy Labeling system is based on EU Regulation 2017/1369/EU. F Samsung The Serif QE55LS01DAU, 139.7 cm (55"), 3840 x 2160 pixels, QLED, Smart TV, Wi-Fi, White Samsung The Serif QE55LS01DAU. Display diagonal: 139.7 cm (55"), Display resolution: 3840 x 2160 pixels, HD type: 4K Ultra HD, Display technology: QLED, Screen shape: Flat. Smart TV. Motion interpolation technology: Motion Xcelerator, Native aspect ratio: 16:9. Digital signal format system: DVB-C, DVB-S2, DVB-T2. Wi-Fi, Ethernet LAN. Product colour: White