How do you control this machine? Is it touch screen based, app based, or physical controls? If physical controls is there enough feedback that you could use thi

How do you control this machine? Is it touch screen based, app based, or physical controls? If physical controls is there enough feedback that you could use this totally blind? Sorry for the somewhat duplicate post but I think this got lost in my prior post where I was discussing both the espresso machine and grinder. edit: I saw the manual after I posted this, looks like it's a simple knob to control pressure with a simple start and stop button.