The Add On Touchscreen is used for adding touch functionality to an existing monitor by mounting the touchscreen externally to the monitor. A very easy way to make your existing monitor touchable. This solution also makes your white board interactive or can replace a defective touchscreen by just adding our unit to your system. We have 32" upto 75" without glass in stock. But we can deliver on request with glass and upto 100". Please ask for our possibilities.