The Polystar PV-310HT DVD Home Theatre System features a 5.1 Channel Sorround digital Output. Compatible with PAL/NTSC TV System, it supports 16:9 and 4:3 TV Picture modes. It is also compatible with DVD/VCD/SVCD/CD/MP3/HDCD/CD-R/CD-RW/Kodak Picture CD. With DOlby AC-3 decoder output, it has free code that makes it compatible for all area-coded DVD. Some other features include Digital echo karaoke, auto-following&singing, individual volume control, 8-language selection and 32-language subtitle setting, Y-Cb Cr component output, composite video and S-video output.