Samsung The Serif QE50LS01DA 50" 4K Ultra HD QLED Smart TV50 inches, QLED, 4K Ultra HD (3840x2160), Bluetooth, App control, Support for HbbTV, Adaptive synchronization, Variable Refresh Rate (VRR), HGiG, Supports Google Assistant, Supports Amazon Alexa, Eco Mode, Supports Samsung Bixby, Upscaling technology, 50 Hz