... Loudspeaker; magnetic-proof,net card, sound card,integrated display card,2.SAW Touch screen:Screen size:15 ... standard pure glass with thickness of 3mm or heat tempered glass with thickness of 6mmWater proof,dust ... value between pricing and function.3.Grade A LCD display:Resolution: 1,920*1,080Screen size:15 ... ,17 19 20,22, inch Grade A LCD monitor,three year guranteed.Brightness: 300cd/m2Contrast ratio ...