Solved Quick question about lcd controller

So I bought a simple reprap discount controller from amazon for $12.98 shipped. It came with the adapter too. Plugged it in and so far so good. It actually seems to be producing better results than with the printer hooked up to my pc. The only weird thing is on the bottom line of the screen when its printing it says ; endstops hit: Z The printer runs fine so probably not a big deal...is it? Thanks for the help , Keith

 

Super ! Thanks for the reply. Looks like I'm good to go .