The whole system basically works in the Plug & Play procedure. Once air Check screw sensors, switch on the appliance, set warning limits and times throw now and then a look at the screen! So good and so simple it works! Until now I have no problems and it all works perfectly! (The receptions / display is as beautiful small that it fits with me in the ashtray, wenns display so longer interferes (eg at night, it is in fact lit), then just shut made;))