Many interior designers prefer switches to be as invisible as possible. Full-flat switches meet this need but such form factor used to be exclusive to luxurious electronic switches and lighting control systems. ZENcelo switches, with the patent-depending “impress.mechanism”, enable electromechanical switches to achieve the same full-flat form factor, in a slim profile and at a price everyone can afford. Expensive and energy wasting illuminations are usually used to tell if such a switch is on or off. On ZENcelo, a clever mechanical device called “Ondicator” has been created to perform this function while maintaining an affordable price.