Smart TV 55" Samsung Ultra 4K Neo QLED Ultra QN70F QN55QN70FAGXZD 120Hz Tizen NQ4 AI Gen2 Bixby Alexa 4 HDMI Smart TV 55" Samsung Ultra 4K Neo QLED Ultra QN70F QN55QN70FAGXZD 120Hz Tizen NQ4 AI Gen2 Bixby Alexa 4 HDMI