SAMSUNG QE77S95CATXXU 77" Smart 4K Ultra HD HDR OLED TV with Bixby 6 Alexa: Naturally bright colour with Quantum Dot technology, Intelligent upscaling with Quantum Processor 4k, Refresh rate: 120 Hz (Up to 144Hz), HDMI 2.1 X 4, 5 year guarantee, Samsung Smart TV has a large choice of apps and services