Horizontal Sharpness:180lines,Convertible from 7"to 8" or 9" via softwear simulation, Selectable 5.1 channel audio output,or fibre-optic digital audio output,ot Co-axial output Bright colourful screen.NTSC/PAL auto-switch,equipped with Light-saving device Fully digital controls,no simulated switches Solidified Lithium Battery,battery content shown on screen Rotatable images,with detachable hanging device for use on car Equipped with video I/O,can receive TV programs by special TV all-frequency station selector option