... tube,no plate Main Character: (1) To eliminate old heating method.(2) With electromagnetic wave and infrared therapeutic theory.(3 ... upgraded TDP lamp,it uses a technology of infrared heating,when the therapy under the effect from electromagnetic wave and infrared,it ... is covered by chemical elements of 31 sorts,they are Heating Elements:Silicon,Calcium, Chromium, Manganese, Iron, Copper,Zinc, Cobalt, ...