... Fair 2011 in HongKong.7" Car Touch Screen PC with GPS,GSM,Blutooth,ITPS* 7" Car PC with Saw Touch screen Technology* OS: Wince 5.0 ... : 300; Contrast: 500:1* Touch Panel: 4 wire resistive touch screen, Saw touch(optinal);* Response time: <10 m/s* Touch life: >10,000,000* Built ... port(optional)* Blutooth 2.0(optional)* Battery(optional) 7" Car Touch Screen PC with GPS,GSM,Blutooth,ITPS