a chamber having an outer wall (16) and an inner wall (4) thermally insulated at the bottom with a thermal insulating material (5), a cover having a movable part (15) pivoted on the outer wall (16) with a pivot assembly (3) for opening the movable part (15) of the cover; a heat spreader assembly (12) mounted at the base of the said outer wall (16); a heater unit (23) located below said heat spreader as~embly (12) and controlled by a control pannel (1) provided with temperature controller (19); and a baby tray (11) supported by an insufating platform (10) located on the said heat spreader assembly (12).
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