5.4 Touchscreen Options Chapter 5P.22Model -19WTRB / -19WTRS -22WTRB / -22WTRSScreen size 19" wide 22" wideInterface USB / serialOptical transmittance 80% ± 3%Surface hardness ≥3H (JIS K5400)Operating system Windows 98 / 2000 / ME / XP / NT / CE, DOS, Linuxe-CapacitiveModel -19WTCB / -19WTCS -22WTCB / -22WTCSScreen size 19" wide 22" wideInterface USB / serialOptical transmittance 93% ± 2%Surface hardness >9H Surface hardness, withstand over 300 million touchesOperating system Windows 98 / 2000 / ME / XP / NT / CE, DOS, Linuxe-ResistiveRemarks■ USB touchscreen package includes 1 x 6ft USB cable, quick reference guideline and CD disc■ Serial touchscreen package includes 1 x 6ft serial cable, quick reference guideline and CD disc■ For detailed information, please refer to the attached CD disc■ As the touchscreen unit is not made of toughened glass, please handle it carefully■ Touchscreen in other brands are available on request