You may forget to close the roof hatch of your caravan or motorhome. Thanks to the E-Switch you can always check this. You will always be aware of this via your smartphone and you will receive a notification when something is still open. You can see at a glance on your smartphone whether all windows, doors and the roof hatch are properly closed. An open roof hatch can be dangerous while driving. It can blow off your vehicle and cause a lot of damage. Prevent this and therefore choose the E-Switch.