The SainSmart 3.2 TFT LCD module works in 3.3V voltage level and you need to use cables to connect with Arduino Mega.
And this shield can help you out of the bothers to use other cables. You just need to plug the module to Mega through this shield.
This shield supports both 16 bit mode. Mega board has enough pins for using SD card and touch function at the same time.
Also, the maximum of 2GB is can be supported.
It also has an adjustable button for contrast of the LCD display.
1 x Touch TFT LCD Expansion Board Adjustable Shield for Arduino Mega 2560