Pro Brand HD3150PLUS ATSC (Off-Air) HDTV Receiver with HDMI Tunes and decode all 18 ATSC broadcast formats Dolby Digital (5.1 Channel Surround Sound) support via optical and coaxial output Selectable HDTV output formats: HDMI and 1080i, 720p, 480p (via YPbPr/RGB component outputs) "Update" and "Rescan" auto channel scanning functions for easy scanning of transmit towers in different locations Volume control, multi-lingual audio, digital closed caption support, and spanish on-screen display menu available