For me, everything works as described. As you said keyboard had to be installed.And rear cam, you can connect the RED/Black wires to your reverse Back light wires. (you may have to refer the car wiring color diagram to determine the correct wires) OR you can check with a TESTER. I do have a question on charging the unit. How log it takes for it to be fully charged ? Seems like if i use the unit with the car charger, it gets dried off in like 15 to 20 minutes even if the charger is plugged in.