Good value blue LCD with 4 lines of 20 characters in white enabling you to autonomously control your 3D printer
Tutorial on how to hook up to RAMPS: LCD and RAMPS
You can use 2x2-wire cables and 1x4wire cable to hook it up. You will need to connect pin 15 and 16 for back light.
In the firmware find the line ULTRA_LCD and uncomment it to use it