For electro-sensitive people there is the possibility to automatically turn off the power in the bedroom, when all consumers (i.e. lamps) are switched off. Thus, the alternating electrical field is reduced, which causes sleep disorders, headaches and a weakening of the immune system in many people. When the light is turned on again, the power is turned on automatically. It is important that it is checked before installing a disconnection relay by a professional, whether the existing electrical installation allows a reduction of the alternating electric field by switching off and which circuit has to be switched off for it. Mounting of demand switches should be done by a qualified electrician.