1.Lithum-ion Battery rechargeable hand warmer 2.can charge to Ipad,Iphone,=1.5pcs ... .Duble side warming,steeless shells on front and back,comfortable3.Portable design,convient for travel,school , outdoor sport and cold enviorment4 ... :5V,1000MAProduct size:88*83*33mm; NW:110g;GW:200g rechargeable hand warmer and mobile power