Front Touch Panel Digitizer Glass Screen for Mach Speed Trio Stealth G4 MST-741 7inch Tablet PC New Orignal(Non-OEM), Grade A Touch Panel Replacement for cracked, damaged, defective, abnormal touch function It will work on Mach Speed Trio Stealth G4 MST-741 7inch Tablet PC Free Screen Protector provide extra protection for your tablet pc NOTE: There are two layers of screen for a tablet. The one on the top is a touch panel, which works for the function of touch. The other below is the LCD screen, which its function is for displaying graphic. This item is just the outside touch screen, it only help you out if your tablet is abnormal in abnormal touch function. If your tablet got a problem in displaying graphic, please buy a LCD display screen.