Designed & built around the panasonic professional 50” th 50ph 20er metal overlay frame that fits directly onto the display with no glass means you can convert it into an interactive solution. n O degradation of displayed image as no glass is being used. Infa-red technology provides a fast & responsive touch action (single touch) with USB (Universal Serial Bus) controller. Operation via finger gloved hand or any other pointer. Supports windows xp windows 7 vista linux & mac os x. Comes complete with a pen stylus.featuressize 50 colour of productblack aspect ratio 16.9 technologyinfa-red dual touchn stylusy speakersn warranty 1 year rtb