For several years now we use heated mattress pad and this is the model that we have chosen because of its robustness, reliability and good temperature stage of operation (No. 2 control box installed). It consists of two parts: firstly the actual heating wire, on the other hand the control box before déclipsable runnability. The textile part is always the same and is the basis of this set. There are variations on the control box thereof has no timer. This is a very nice accessory in winter when we prefer a cool room to sleep quality and at the same time benefit from a pleasant feeling of warmth when one slips into the bed Simply preheat fifteen minutes in position 3 so that the bed is already a very warm comfortable warmth, we must move quickly enough in position 2 or 1 before stopping. Ideally, however, stop the heating of the topper about 15 minutes after lying down. Good accessory if you like cool rooms and warm beds in winter.