... 3, may want to choose desktop, or vertical; 4, touch screen touch screen using infrared sensors; high-density infrared tubes, light stability ... , not afraid of strobe, handwriting fluency; 9, according to KTV professional integrated design, with vents, heat evenly; 10, the ... assurance and price.. Size: 17,19 inches 2. Type: infrared touch one machine 3. Transmittance: 92% 4. Against light resistance: ...