Material: neoprene + flannel + graphene, Product size: 101 * 18.5cm, weighing about 250g, rated power 10W, rated voltage 5V, heating temperature 35~ 65 . Three-speed intelligent temperature regulation: low temperature range 35~ 45 , medium temperature range 45~ 55 , high temperature range 55~ 65 . 4 cartilage support designs to effectively support the waist. This heating pad is the best ideal gift to grandparents, friends or to your wife or girlfriend. It is suitable as a Father's Day or Mothers day gift. Get one for yourself and benefit from its comfortable warmth whenever you need it. Graphene is a new type of thermal conductive material which has a thermal conductivity that is 10 times higher than copper and aluminum. It can heat up within 5 seconds, no need to wait. When graphene heats up, it releases far-infrared rays with wavelengths close to the human body to radiate energy. The heat easily penetrates the skin, just like the warmth of light sunlight.